21056271175 has 24 divisors (see below), whose sum is σ = 26729244080. Its totient is φ = 16445721600.

The previous prime is 21056271161. The next prime is 21056271199. The reversal of 21056271175 is 57117265012.

It is a de Polignac number, because none of the positive numbers 2^k-21056271175 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3984535 + ... + 3989815.

Almost surely, 2^21056271175 is an apocalyptic number.

21056271175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21056271175 is a deficient number, since it is larger than the sum of its proper divisors (5672972905).

21056271175 is a wasteful number, since it uses less digits than its factorization.

21056271175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043 (or 9038 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 21056271175 in words is "twenty-one billion, fifty-six million, two hundred seventy-one thousand, one hundred seventy-five".