22021000212 has 24 divisors (see below), whose sum is σ = 52577273056. Its totient is φ = 7169627808.

The previous prime is 22021000187. The next prime is 22021000231. The reversal of 22021000212 is 21200012022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21337663 + ... + 21338694.

Almost surely, 2^22021000212 is an apocalyptic number.

It is an amenable number.

22021000212 is an abundant number, since it is smaller than the sum of its proper divisors (30556272844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021000212 is a wasteful number, since it uses less digits than its factorization.

22021000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42676407 (or 42676405 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22021000212 its reverse (21200012022), we get a palindrome (43221012234).

The spelling of 22021000212 in words is "twenty-two billion, twenty-one million, two hundred twelve", and thus it is an aban number.