21001332132131 has 8 divisors (see below), whose sum is σ = 22624028960064. Its totient is φ = 19379665267200.

The previous prime is 21001332132073. The next prime is 21001332132161. The reversal of 21001332132131 is 13123123310012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001332132131 is a prime.

It is a super-2 number, since 2×21001332132131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001332132097 and 21001332132106.

It is not an unprimeable number, because it can be changed into a prime (21001332132161) 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, 257448395 + ... + 257529956.

It is an arithmetic number, because the mean of its divisors is an integer number (2828003620008).

Almost surely, 2^{21001332132131} is an apocalyptic number.

21001332132131 is a deficient number, since it is larger than the sum of its proper divisors (1622696827933).

21001332132131 is a wasteful number, since it uses less digits than its factorization.

21001332132131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514981501.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21001332132131 its reverse (13123123310012), we get a palindrome (34124455442143).

The spelling of 21001332132131 in words is "twenty-one trillion, one billion, three hundred thirty-two million, one hundred thirty-two thousand, one hundred thirty-one".