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2001101212021 = 103135131437739
BaseRepresentation
bin11101000111101010111…
…011010100100101110101
321002022012011222012212111
4131013222323110211311
5230241223402241041
64131143155451021
7264401103436522
oct35075273244565
97068164865774
102001101212021
1170173151376a
122839b08b6a71
1311691a74a912
146cbd4c26149
15370bea02981
hex1d1eaed4975

2001101212021 has 8 divisors (see below), whose sum is σ = 2020680309440. Its totient is φ = 1981525017312.

The previous prime is 2001101212013. The next prime is 2001101212043. The reversal of 2001101212021 is 1202121011002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001101212021 - 23 = 2001101212013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001101211992 and 2001101212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001101212321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672970 + ... + 2110708.

It is an arithmetic number, because the mean of its divisors is an integer number (252585038680).

Almost surely, 22001101212021 is an apocalyptic number.

It is an amenable number.

2001101212021 is a deficient number, since it is larger than the sum of its proper divisors (19579097419).

2001101212021 is a wasteful number, since it uses less digits than its factorization.

2001101212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451355.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001101212021 its reverse (1202121011002), we get a palindrome (3203222223023).

It can be divided in two parts, 2001101 and 212021, that added together give a palindrome (2213122).

The spelling of 2001101212021 in words is "two trillion, one billion, one hundred one million, two hundred twelve thousand, twenty-one".

Divisors: 1 103 13513 1391839 1437739 148087117 19428167107 2001101212021