22121992 has 16 divisors (see below), whose sum is σ = 41586300. Its totient is φ = 11032320.

The previous prime is 22121987. The next prime is 22122011. The reversal of 22121992 is 29912122.

It can be written as a sum of positive squares in 2 ways, for example, as 18714276 + 3407716 = 4326^2 + 1846^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22121992.

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, 109 + ... + 6652.

Almost surely, 2^22121992 is an apocalyptic number.

It is an amenable number.

22121992 is a deficient number, since it is larger than the sum of its proper divisors (19464308).

22121992 is a wasteful number, since it uses less digits than its factorization.

22121992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176 (or 7172 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 22121992 is about 4703.4021728957. The cubic root of 22121992 is about 280.7208974622.

The spelling of 22121992 in words is "twenty-two million, one hundred twenty-one thousand, nine hundred ninety-two".