21222022211121 has 32 divisors (see below), whose sum is σ = 31501715011200. Its totient is φ = 12645849646080.

The previous prime is 21222022211111. The next prime is 21222022211141. The reversal of 21222022211121 is 12111222022212.

It is not a de Polignac number, because 21222022211121 - 2²² = 21222018016817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222022211111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117523711 + ... + 117704148.

It is an arithmetic number, because the mean of its divisors is an integer number (984428594100).

Almost surely, 2^{21222022211121} is an apocalyptic number.

It is an amenable number.

21222022211121 is a deficient number, since it is larger than the sum of its proper divisors (10279692800079).

21222022211121 is a wasteful number, since it uses less digits than its factorization.

21222022211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235227969.

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

Adding to 21222022211121 its reverse (12111222022212), we get a palindrome (33333244233333).

The spelling of 21222022211121 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, two hundred eleven thousand, one hundred twenty-one".