22121011212210 has 48 divisors (see below), whose sum is σ = 58023608197464. Its totient is φ = 5846733344256.

The previous prime is 22121011212187. The next prime is 22121011212211. The reversal of 22121011212210 is 1221211012122.

22121011212210 is a `hidden beast` number, since 2 + 21 + 210 + 11 + 212 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18697486235481 + 3423524976729 = 4324059^2 + 1850277^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22121011212211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1087551837 + ... + 1087572176.

Almost surely, 2^{22121011212210} is an apocalyptic number.

22121011212210 is an abundant number, since it is smaller than the sum of its proper divisors (35902596985254).

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

22121011212210 is a wasteful number, since it uses less digits than its factorization.

22121011212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175124139 (or 2175124136 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22121011212210 its reverse (1221211012122), we get a palindrome (23342222224332).

The spelling of 22121011212210 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, two hundred ten".