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20201121122021 = 7192392513676899
BaseRepresentation
bin1001001011111011100001…
…01001100000011011100101
32122112012121212100002102222
410211331300221200123211
510121433344001401041
6110544133353442125
74153324420243130
oct445756051403345
978465555302388
1020201121122021
11648927a25a864
122323142710345
13b36c5a96a908
144dba4d1b9217
1525072696474b
hex125f70a606e5

20201121122021 has 64 divisors (see below), whose sum is σ = 24571330560000. Its totient is φ = 16223516568000.

The previous prime is 20201121122003. The next prime is 20201121122027. The reversal of 20201121122021 is 12022112110202.

It is not a de Polignac number, because 20201121122021 - 230 = 20200047380197 is a prime.

It is a super-2 number, since 2×202011211220212 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201121122027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2928119630 + ... + 2928126528.

It is an arithmetic number, because the mean of its divisors is an integer number (383927040000).

Almost surely, 220201121122021 is an apocalyptic number.

It is an amenable number.

20201121122021 is a deficient number, since it is larger than the sum of its proper divisors (4370209437979).

20201121122021 is a wasteful number, since it uses less digits than its factorization.

20201121122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20201121122021 its reverse (12022112110202), we get a palindrome (32223233232223).

The spelling of 20201121122021 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty-one".

Divisors: 1 7 19 133 239 251 367 1673 1757 2569 4541 4769 6899 6973 31787 33383 48293 48811 59989 87713 92117 131081 419923 613991 644819 917567 1139791 1648861 1666547 1731649 1750223 2531933 7978537 11542027 11665829 12121543 12251561 17723531 22015963 31328359 32901331 48106727 154111741 219298513 230309317 336747089 413864111 418303297 605131987 635515183 2897048777 2928123079 4235923909 4448606281 7863418109 11497507753 12074788477 55043926763 80482554271 84523519339 151888128737 1063216901159 2885874446003 20201121122021