22121000212 has 12 divisors (see below), whose sum is σ = 39960516736. Its totient is φ = 10703709720.

The previous prime is 22121000171. The next prime is 22121000233. The reversal of 22121000212 is 21200012122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22121000192 and 22121000201.

It is a congruent number.

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, 89197458 + ... + 89197705.

Almost surely, 2^22121000212 is an apocalyptic number.

It is an amenable number.

22121000212 is a deficient number, since it is larger than the sum of its proper divisors (17839516524).

22121000212 is a wasteful number, since it uses less digits than its factorization.

22121000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178395198 (or 178395196 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22121000212 its reverse (21200012122), we get a palindrome (43321012334).

The spelling of 22121000212 in words is "twenty-two billion, one hundred twenty-one million, two hundred twelve", and thus it is an aban number.