22121022210 has 64 divisors (see below), whose sum is σ = 60688023552. Its totient is φ = 5055132096.

The previous prime is 22121022167. The next prime is 22121022221. The reversal of 22121022210 is 1222012122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22121022210.

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, 1323727 + ... + 1340333.

It is an arithmetic number, because the mean of its divisors is an integer number (948250368).

Almost surely, 2^22121022210 is an apocalyptic number.

22121022210 is an abundant number, since it is smaller than the sum of its proper divisors (38567001342).

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

22121022210 is a wasteful number, since it uses less digits than its factorization.

22121022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22967.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22121022210 its reverse (1222012122), we get a palindrome (23343034332).

The spelling of 22121022210 in words is "twenty-two billion, one hundred twenty-one million, twenty-two thousand, two hundred ten".