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1211010122021 = 71913109291337
BaseRepresentation
bin10001100111110101110…
…101000000000100100101
311021202211101012021000112
4101213311311000010211
5124320122042401041
62324155205422405
7153330650124110
oct21476565000445
94252741167015
101211010122021
1142764a708797
12176850a0aa05
138a2756475cb
14428828b1577
152177b5c8deb
hex119f5d40125

1211010122021 has 16 divisors (see below), whose sum is σ = 1391709972480. Its totient is φ = 1032238408320.

The previous prime is 1211010122009. The next prime is 1211010122149. The reversal of 1211010122021 is 1202210101121.

It is not a de Polignac number, because 1211010122021 - 210 = 1211010120997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211010121987 and 1211010122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211010122921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4011065 + ... + 4302401.

It is an arithmetic number, because the mean of its divisors is an integer number (86981873280).

Almost surely, 21211010122021 is an apocalyptic number.

It is an amenable number.

1211010122021 is a deficient number, since it is larger than the sum of its proper divisors (180699850459).

1211010122021 is a wasteful number, since it uses less digits than its factorization.

1211010122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294644.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211010122021 its reverse (1202210101121), we get a palindrome (2413220223142).

The spelling of 1211010122021 in words is "one trillion, two hundred eleven billion, ten million, one hundred twenty-two thousand, twenty-one".

Divisors: 1 7 191 1337 3109 21763 291337 593819 2039359 4156733 55645367 389517569 905766733 6340367131 173001446003 1211010122021