21120995275 has 6 divisors (see below), whose sum is σ = 26190034172. Its totient is φ = 16896796200.

The previous prime is 21120995267. The next prime is 21120995293. The reversal of 21120995275 is 57259902112.

It is not a de Polignac number, because 21120995275 - 2³ = 21120995267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 422419881 + ... + 422419930.

Almost surely, 2^21120995275 is an apocalyptic number.

21120995275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21120995275 is a deficient number, since it is larger than the sum of its proper divisors (5069038897).

21120995275 is an equidigital number, since it uses as much as digits as its factorization.

21120995275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844839821 (or 844839816 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 21120995275 in words is "twenty-one billion, one hundred twenty million, nine hundred ninety-five thousand, two hundred seventy-five".