22121022434121 has 48 divisors (see below), whose sum is σ = 34888647939600. Its totient is φ = 13423843915776.

The previous prime is 22121022434081. The next prime is 22121022434129. The reversal of 22121022434121 is 12143422012122.

22121022434121 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 1 + 0 + 2 + 243 + 412 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 636267856896 + 21484754577225 = 797664^2 + 4635165^2 .

It is not a de Polignac number, because 22121022434121 - 2¹⁴ = 22121022417737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22121022434129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44069685 + ... + 44568813.

It is an arithmetic number, because the mean of its divisors is an integer number (726846832075).

Almost surely, 2^{22121022434121} is an apocalyptic number.

It is an amenable number.

22121022434121 is a deficient number, since it is larger than the sum of its proper divisors (12767625505479).

22121022434121 is a wasteful number, since it uses less digits than its factorization.

22121022434121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504410 (or 504407 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 22121022434121 its reverse (12143422012122), we get a palindrome (34264444446243).

The spelling of 22121022434121 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two million, four hundred thirty-four thousand, one hundred twenty-one".