21154288001 has 32 divisors (see below), whose sum is σ = 27803243520. Its totient is φ = 15593256000.

The previous prime is 21154287983. The next prime is 21154288007. The reversal of 21154288001 is 10088245112.

It is not a de Polignac number, because 21154288001 - 2¹⁰ = 21154286977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21154288007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1015250 + ... + 1035876.

It is an arithmetic number, because the mean of its divisors is an integer number (868851360).

Almost surely, 2^21154288001 is an apocalyptic number.

It is an amenable number.

21154288001 is a deficient number, since it is larger than the sum of its proper divisors (6648955519).

21154288001 is a wasteful number, since it uses less digits than its factorization.

21154288001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21365.

The product of its (nonzero) digits is 5120, while the sum is 32.

The spelling of 21154288001 in words is "twenty-one billion, one hundred fifty-four million, two hundred eighty-eight thousand, one".