22121121020202 has 64 divisors (see below), whose sum is σ = 50248674293760. Its totient is φ = 7210392319152.

The previous prime is 22121121020177. The next prime is 22121121020213. The reversal of 22121121020202 is 20202012112122.

It is a happy number.

22121121020202 is a `hidden beast` number, since 2 + 21 + 211 + 210 + 20 + 202 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030488 + ... + 6730835.

It is an arithmetic number, because the mean of its divisors is an integer number (785135535840).

Almost surely, 2^{22121121020202} is an apocalyptic number.

22121121020202 is an abundant number, since it is smaller than the sum of its proper divisors (28127553273558).

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

22121121020202 is a wasteful number, since it uses less digits than its factorization.

22121121020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7762504 (or 7762498 counting only the distinct ones).

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

Adding to 22121121020202 its reverse (20202012112122), we get a palindrome (42323133132324).

The spelling of 22121121020202 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, twenty thousand, two hundred two".