202161630021 has 32 divisors (see below), whose sum is σ = 293653584000. Its totient is φ = 122963816448.

The previous prime is 202161630007. The next prime is 202161630049. The reversal of 202161630021 is 120036161202.

202161630021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202161630021 - 2¹⁰ = 202161628997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202161629973 and 202161630000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202161630091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10990410 + ... + 11008788.

It is an arithmetic number, because the mean of its divisors is an integer number (9176674500).

Almost surely, 2^202161630021 is an apocalyptic number.

It is an amenable number.

202161630021 is a deficient number, since it is larger than the sum of its proper divisors (91491953979).

202161630021 is a wasteful number, since it uses less digits than its factorization.

202161630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21653.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 202161630021 its reverse (120036161202), we get a palindrome (322197791223).

The spelling of 202161630021 in words is "two hundred two billion, one hundred sixty-one million, six hundred thirty thousand, twenty-one".