22221111122210 has 128 divisors (see below), whose sum is σ = 54235329781248. Its totient is φ = 6329986560000.

The previous prime is 22221111122191. The next prime is 22221111122279. The reversal of 22221111122210 is 1222111112222.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9978551 + ... + 12000570.

It is an arithmetic number, because the mean of its divisors is an integer number (423713513916).

Almost surely, 2^{22221111122210} is an apocalyptic number.

22221111122210 is an abundant number, since it is smaller than the sum of its proper divisors (32014218659038).

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

22221111122210 is a wasteful number, since it uses less digits than its factorization.

22221111122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21979260.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22221111122210 its reverse (1222111112222), we get a palindrome (23443222234432).

The spelling of 22221111122210 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred ten".