22121912 has 8 divisors (see below), whose sum is σ = 41478600. Its totient is φ = 11060952.

The previous prime is 22121903. The next prime is 22121921. The reversal of 22121912 is 21912122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22121903) and next prime (22121921).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382612 + ... + 1382627.

It is an arithmetic number, because the mean of its divisors is an integer number (5184825).

Almost surely, 2^22121912 is an apocalyptic number.

It is an amenable number.

22121912 is a deficient number, since it is larger than the sum of its proper divisors (19356688).

22121912 is a wasteful number, since it uses less digits than its factorization.

22121912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765245 (or 2765241 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 22121912 is about 4703.3936684058. The cubic root of 22121912 is about 280.7205590704.

The spelling of 22121912 in words is "twenty-two million, one hundred twenty-one thousand, nine hundred twelve".