22131212208 has 60 divisors (see below), whose sum is σ = 66506558040. Its totient is φ = 6323202816.

The previous prime is 22131212197. The next prime is 22131212231. The reversal of 22131212208 is 80221213122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4702413 + ... + 4707116.

It is an arithmetic number, because the mean of its divisors is an integer number (1108442634).

Almost surely, 2^22131212208 is an apocalyptic number.

22131212208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22131212208 is an abundant number, since it is smaller than the sum of its proper divisors (44375345832).

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

22131212208 is a wasteful number, since it uses less digits than its factorization.

22131212208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9409554 (or 9409541 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 22131212208 in words is "twenty-two billion, one hundred thirty-one million, two hundred twelve thousand, two hundred eight".