2156513226201 has 12 divisors (see below), whose sum is σ = 3145804773540. Its totient is φ = 1423441072800.

The previous prime is 2156513226193. The next prime is 2156513226233. The reversal of 2156513226201 is 1026223156512.

2156513226201 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 5 + 1 + 3 + 22 + 620 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1993458786201 + 163054440000 = 1411899^2 + 403800^2 .

It is not a de Polignac number, because 2156513226201 - 2³ = 2156513226193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156513226601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1186199986 + ... + 1186201803.

It is an arithmetic number, because the mean of its divisors is an integer number (262150397795).

Almost surely, 2^{2156513226201} is an apocalyptic number.

It is an amenable number.

2156513226201 is a deficient number, since it is larger than the sum of its proper divisors (989291547339).

2156513226201 is a wasteful number, since it uses less digits than its factorization.

2156513226201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372401896 (or 2372401893 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 2156513226201 in words is "two trillion, one hundred fifty-six billion, five hundred thirteen million, two hundred twenty-six thousand, two hundred one".