22121102220102 has 32 divisors (see below), whose sum is σ = 49158243329760. Its totient is φ = 7373664980640.

The previous prime is 22121102220097. The next prime is 22121102220103. The reversal of 22121102220102 is 20102220112122.

It is a happy number.

22121102220102 is a `hidden beast` number, since 221 + 21 + 102 + 220 + 102 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121102220103) 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, 11742952 + ... + 13495892.

It is an arithmetic number, because the mean of its divisors is an integer number (1536195104055).

Almost surely, 2^{22121102220102} is an apocalyptic number.

22121102220102 is an abundant number, since it is smaller than the sum of its proper divisors (27037141109658).

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

22121102220102 is a wasteful number, since it uses less digits than its factorization.

22121102220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986645 (or 1986639 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22121102220102 its reverse (20102220112122), we get a palindrome (42223322332224).

The spelling of 22121102220102 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty thousand, one hundred two".