210221044902156 has 24 divisors (see below), whose sum is σ = 490941197118064. Its totient is φ = 70012906536960.

The previous prime is 210221044902061. The next prime is 210221044902157. The reversal of 210221044902156 is 651209440122012.

It is a happy number.

It is a super-2 number, since 2×210221044902156² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210221044902157) 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, 7596872725 + ... + 7596900396.

Almost surely, 2^{210221044902156} is an apocalyptic number.

It is an amenable number.

210221044902156 is an abundant number, since it is smaller than the sum of its proper divisors (280720152215908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210221044902156 is a wasteful number, since it uses less digits than its factorization.

210221044902156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15193774281 (or 15193774279 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 210221044902156 in words is "two hundred ten trillion, two hundred twenty-one billion, forty-four million, nine hundred two thousand, one hundred fifty-six".