22122211121021 has 16 divisors (see below), whose sum is σ = 24148656956160. Its totient is φ = 20098325345280.

The previous prime is 22122211120987. The next prime is 22122211121029. The reversal of 22122211121021 is 12012111222122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22122211121021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22122211120984 and 22122211121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122211121029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111169805 + ... + 111368621.

It is an arithmetic number, because the mean of its divisors is an integer number (1509291059760).

Almost surely, 2^{22122211121021} is an apocalyptic number.

It is an amenable number.

22122211121021 is a deficient number, since it is larger than the sum of its proper divisors (2026445835139).

22122211121021 is a wasteful number, since it uses less digits than its factorization.

22122211121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205204.

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

Adding to 22122211121021 its reverse (12012111222122), we get a palindrome (34134322343143).

The spelling of 22122211121021 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, twenty-one".