21265114571 has 8 divisors (see below), whose sum is σ = 21828526944. Its totient is φ = 20703833280.

The previous prime is 21265114561. The next prime is 21265114573. The reversal of 21265114571 is 17541156212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21265114571 - 2¹⁰ = 21265113547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21265114573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512540 + ... + 552473.

It is an arithmetic number, because the mean of its divisors is an integer number (2728565868).

Almost surely, 2^21265114571 is an apocalyptic number.

21265114571 is a deficient number, since it is larger than the sum of its proper divisors (563412373).

21265114571 is a wasteful number, since it uses less digits than its factorization.

21265114571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065541.

The product of its digits is 16800, while the sum is 35.

The spelling of 21265114571 in words is "twenty-one billion, two hundred sixty-five million, one hundred fourteen thousand, five hundred seventy-one".