21274111275 has 24 divisors (see below), whose sum is σ = 35179925424. Its totient is φ = 11344022400.

The previous prime is 21274111259. The next prime is 21274111301. The reversal of 21274111275 is 57211147212.

It is not a de Polignac number, because 21274111275 - 2⁴ = 21274111259 is a prime.

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, 415377 + ... + 463773.

It is an arithmetic number, because the mean of its divisors is an integer number (1465830226).

Almost surely, 2^21274111275 is an apocalyptic number.

21274111275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21274111275 is a deficient number, since it is larger than the sum of its proper divisors (13905814149).

21274111275 is a wasteful number, since it uses less digits than its factorization.

21274111275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54271 (or 54266 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

Adding to 21274111275 its reverse (57211147212), we get a palindrome (78485258487).

The spelling of 21274111275 in words is "twenty-one billion, two hundred seventy-four million, one hundred eleven thousand, two hundred seventy-five".