21122614756 has 12 divisors (see below), whose sum is σ = 36967186620. Its totient is φ = 10560561440.

The previous prime is 21122614729. The next prime is 21122614763. The reversal of 21122614756 is 65741622112.

It can be written as a sum of positive squares in 2 ways, for example, as 20798254656 + 324360100 = 144216^2 + 18010^2 .

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, 120151 + ... + 238078.

It is an arithmetic number, because the mean of its divisors is an integer number (3080598885).

Almost surely, 2^21122614756 is an apocalyptic number.

It is an amenable number.

21122614756 is a deficient number, since it is larger than the sum of its proper divisors (15844571864).

21122614756 is a wasteful number, since it uses less digits than its factorization.

21122614756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372974 (or 372972 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The spelling of 21122614756 in words is "twenty-one billion, one hundred twenty-two million, six hundred fourteen thousand, seven hundred fifty-six".