21270605125 has 48 divisors (see below), whose sum is σ = 33346849536. Its totient is φ = 13259532000.

The previous prime is 21270605113. The next prime is 21270605141. The reversal of 21270605125 is 52150607212.

It is not a de Polignac number, because 21270605125 - 2⁷ = 21270604997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5424 + ... + 206326.

It is an arithmetic number, because the mean of its divisors is an integer number (694726032).

Almost surely, 2^21270605125 is an apocalyptic number.

21270605125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21270605125 is a deficient number, since it is larger than the sum of its proper divisors (12076244411).

21270605125 is a wasteful number, since it uses less digits than its factorization.

21270605125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200947 (or 200926 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 21270605125 in words is "twenty-one billion, two hundred seventy million, six hundred five thousand, one hundred twenty-five".