22121200021122 has 64 divisors (see below), whose sum is σ = 53031955772160. Its totient is φ = 6809041204992.

The previous prime is 22121200021121. The next prime is 22121200021133. The reversal of 22121200021122 is 22112000212122.

It is a happy number.

22121200021122 is a `hidden beast` number, since 221 + 212 + 0 + 0 + 0 + 211 + 22 = 666.

It is a super-2 number, since 2×22121200021122² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 22121200021095 and 22121200021104.

It is not an unprimeable number, because it can be changed into a prime (22121200021121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227283118 + ... + 227380425.

It is an arithmetic number, because the mean of its divisors is an integer number (828624308940).

Almost surely, 2^{22121200021122} is an apocalyptic number.

22121200021122 is an abundant number, since it is smaller than the sum of its proper divisors (30910755751038).

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

22121200021122 is a wasteful number, since it uses less digits than its factorization.

22121200021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454663624 (or 454663618 counting only the distinct ones).

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

Adding to 22121200021122 its reverse (22112000212122), we get a palindrome (44233200233244).

The spelling of 22121200021122 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, one hundred twenty-two".