21053264271 has 64 divisors (see below), whose sum is σ = 31848284160. Its totient is φ = 12284737920.

The previous prime is 21053264269. The next prime is 21053264293. The reversal of 21053264271 is 17246235012.

It is not a de Polignac number, because 21053264271 - 2¹ = 21053264269 is a prime.

It is a super-2 number, since 2×21053264271² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21053264251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10324270 + ... + 10326308.

It is an arithmetic number, because the mean of its divisors is an integer number (497629440).

Almost surely, 2^21053264271 is an apocalyptic number.

21053264271 is a deficient number, since it is larger than the sum of its proper divisors (10795019889).

21053264271 is a wasteful number, since it uses less digits than its factorization.

21053264271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 21053264271 its reverse (17246235012), we get a palindrome (38299499283).

The spelling of 21053264271 in words is "twenty-one billion, fifty-three million, two hundred sixty-four thousand, two hundred seventy-one".