22121000012 has 12 divisors (see below), whose sum is σ = 38713696560. Its totient is φ = 11059943856.

The previous prime is 22121000009. The next prime is 22121000029. The reversal of 22121000012 is 21000012122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22120999957 and 22121000002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42023 + ... + 214494.

It is an arithmetic number, because the mean of its divisors is an integer number (3226141380).

Almost surely, 2^22121000012 is an apocalyptic number.

It is an amenable number.

22121000012 is a deficient number, since it is larger than the sum of its proper divisors (16592696548).

22121000012 is a wasteful number, since it uses less digits than its factorization.

22121000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278080 (or 278078 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22121000012 its reverse (21000012122), we get a palindrome (43121012134).

The spelling of 22121000012 in words is "twenty-two billion, one hundred twenty-one million, twelve", and thus it is an aban number.