22112222120021 has 4 divisors (see below), whose sum is σ = 24122424130944. Its totient is φ = 20102020109100.

The previous prime is 22112222119993. The next prime is 22112222120041. The reversal of 22112222120021 is 12002122221122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22112222120021 - 2¹⁴ = 22112222103637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22112222119975 and 22112222120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112222120041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005101005445 + ... + 1005101005466.

It is an arithmetic number, because the mean of its divisors is an integer number (6030606032736).

Almost surely, 2^{22112222120021} is an apocalyptic number.

It is an amenable number.

22112222120021 is a deficient number, since it is larger than the sum of its proper divisors (2010202010923).

22112222120021 is a wasteful number, since it uses less digits than its factorization.

22112222120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010202010922.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22112222120021 its reverse (12002122221122), we get a palindrome (34114344341143).

The spelling of 22112222120021 in words is "twenty-two trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, twenty-one".