21222120211122 has 32 divisors (see below), whose sum is σ = 43383238530048. Its totient is φ = 6918393246336.

The previous prime is 21222120211079. The next prime is 21222120211133. The reversal of 21222120211122 is 22111202122212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106507858 + ... + 106706925.

It is an arithmetic number, because the mean of its divisors is an integer number (1355726204064).

Almost surely, 2^{21222120211122} is an apocalyptic number.

21222120211122 is an abundant number, since it is smaller than the sum of its proper divisors (22161118318926).

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

21222120211122 is a wasteful number, since it uses less digits than its factorization.

21222120211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213215154.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21222120211122 its reverse (22111202122212), we get a palindrome (43333322333334).

The spelling of 21222120211122 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred eleven thousand, one hundred twenty-two".