21132002001 has 64 divisors (see below), whose sum is σ = 32039884800. Its totient is φ = 12277440000.

The previous prime is 21132001987. The next prime is 21132002009. The reversal of 21132002001 is 10020023112.

It is not a de Polignac number, because 21132002001 - 2⁷ = 21132001873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21132002009) 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, 35161101 + ... + 35161701.

It is an arithmetic number, because the mean of its divisors is an integer number (500623200).

Almost surely, 2^21132002001 is an apocalyptic number.

It is an amenable number.

21132002001 is a deficient number, since it is larger than the sum of its proper divisors (10907882799).

21132002001 is a wasteful number, since it uses less digits than its factorization.

21132002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21132002001 its reverse (10020023112), we get a palindrome (31152025113).

The spelling of 21132002001 in words is "twenty-one billion, one hundred thirty-two million, two thousand, one".