22787104221 has 32 divisors (see below), whose sum is σ = 38596711680. Its totient is φ = 13016014848.

The previous prime is 22787104217. The next prime is 22787104253. The reversal of 22787104221 is 12240178722.

22787104221 is a `hidden beast` number, since 227 + 8 + 7 + 1 + 0 + 422 + 1 = 666.

It is not a de Polignac number, because 22787104221 - 2² = 22787104217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22787104321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479485 + ... + 524861.

It is an arithmetic number, because the mean of its divisors is an integer number (1206147240).

Almost surely, 2^22787104221 is an apocalyptic number.

22787104221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22787104221 is a deficient number, since it is larger than the sum of its proper divisors (15809607459).

22787104221 is a wasteful number, since it uses less digits than its factorization.

22787104221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48050 (or 48044 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The spelling of 22787104221 in words is "twenty-two billion, seven hundred eighty-seven million, one hundred four thousand, two hundred twenty-one".