21122152 has 32 divisors (see below), whose sum is σ = 40612320. Its totient is φ = 10296000.

The previous prime is 21122111. The next prime is 21122161. The reversal of 21122152 is 25122112.

It is a happy number.

It is a super-2 number, since 2×21122152² = 892290610222208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84027 + ... + 84277.

It is an arithmetic number, because the mean of its divisors is an integer number (1269135).

Almost surely, 2^21122152 is an apocalyptic number.

It is an amenable number.

21122152 is a deficient number, since it is larger than the sum of its proper divisors (19490168).

21122152 is a wasteful number, since it uses less digits than its factorization.

21122152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 477 counting only the distinct ones).

The product of its digits is 80, while the sum is 16.

The square root of 21122152 is about 4595.8842457138. The cubic root of 21122152 is about 276.4263172849.

Adding to 21122152 its reverse (25122112), we get a palindrome (46244264).

The spelling of 21122152 in words is "twenty-one million, one hundred twenty-two thousand, one hundred fifty-two".