21252622112 has 18 divisors (see below), whose sum is σ = 41842723419. Its totient is φ = 10625898720.

The previous prime is 21252622093. The next prime is 21252622133. The reversal of 21252622112 is 21122625212.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10626311056 + 10626311056 = 103084^2 + 103084^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=103084.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 811787 + ... + 837557.

Almost surely, 2^21252622112 is an apocalyptic number.

It is an amenable number.

21252622112 is a deficient number, since it is larger than the sum of its proper divisors (20590101307).

21252622112 is an frugal number, since it uses more digits than its factorization.

21252622112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51552 (or 25773 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The spelling of 21252622112 in words is "twenty-one billion, two hundred fifty-two million, six hundred twenty-two thousand, one hundred twelve".