21120025074208 has 24 divisors (see below), whose sum is σ = 42364578601548. Its totient is φ = 10360767016704.

The previous prime is 21120025074199. The next prime is 21120025074221. The reversal of 21120025074208 is 80247052002112.

It can be written as a sum of positive squares in 2 ways, for example, as 18171702557584 + 2948322516624 = 4262828^2 + 1717068^2 .

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, 6226420791 + ... + 6226424182.

Almost surely, 2^{21120025074208} is an apocalyptic number.

It is an amenable number.

21120025074208 is an abundant number, since it is smaller than the sum of its proper divisors (21244553527340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120025074208 is a wasteful number, since it uses less digits than its factorization.

21120025074208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452845036 (or 12452845028 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The spelling of 21120025074208 in words is "twenty-one trillion, one hundred twenty billion, twenty-five million, seventy-four thousand, two hundred eight".