21372671271 has 16 divisors (see below), whose sum is σ = 33983875584. Its totient is φ = 11681956704.

The previous prime is 21372671263. The next prime is 21372671273. The reversal of 21372671271 is 17217627312.

It is not a de Polignac number, because 21372671271 - 2³ = 21372671263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21372671273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22124436 + ... + 22125401.

It is an arithmetic number, because the mean of its divisors is an integer number (2123992224).

Almost surely, 2^21372671271 is an apocalyptic number.

21372671271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21372671271 is a deficient number, since it is larger than the sum of its proper divisors (12611204313).

21372671271 is a wasteful number, since it uses less digits than its factorization.

21372671271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44249870.

The product of its digits is 49392, while the sum is 39.

The spelling of 21372671271 in words is "twenty-one billion, three hundred seventy-two million, six hundred seventy-one thousand, two hundred seventy-one".