22012122112121 has 16 divisors (see below), whose sum is σ = 22321241653248. Its totient is φ = 21705149466000.

The previous prime is 22012122112103. The next prime is 22012122112133. The reversal of 22012122112121 is 12121122121022.

It is a cyclic number.

It is not a de Polignac number, because 22012122112121 - 2³⁴ = 21994942242937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012122112093 and 22012122112102.

It is not an unprimeable number, because it can be changed into a prime (22012122112151) 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, 19574696 + ... + 20668646.

It is an arithmetic number, because the mean of its divisors is an integer number (1395077603328).

Almost surely, 2^{22012122112121} is an apocalyptic number.

It is an amenable number.

22012122112121 is a deficient number, since it is larger than the sum of its proper divisors (309119541127).

22012122112121 is a wasteful number, since it uses less digits than its factorization.

22012122112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094932.

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

Adding to 22012122112121 its reverse (12121122121022), we get a palindrome (34133244233143).

The spelling of 22012122112121 in words is "twenty-two trillion, twelve billion, one hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".