21632501133131 has 4 divisors (see below), whose sum is σ = 24722858437872. Its totient is φ = 18542143828392.

The previous prime is 21632501133091. The next prime is 21632501133163. The reversal of 21632501133131 is 13133110523612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21632501133131 is a prime.

It is a super-2 number, since 2×21632501133131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21632501133031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545178652360 + ... + 1545178652373.

It is an arithmetic number, because the mean of its divisors is an integer number (6180714609468).

Almost surely, 2^{21632501133131} is an apocalyptic number.

21632501133131 is a deficient number, since it is larger than the sum of its proper divisors (3090357304741).

21632501133131 is an equidigital number, since it uses as much as digits as its factorization.

21632501133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090357304740.

The product of its (nonzero) digits is 9720, while the sum is 32.

Adding to 21632501133131 its reverse (13133110523612), we get a palindrome (34765611656743).

The spelling of 21632501133131 in words is "twenty-one trillion, six hundred thirty-two billion, five hundred one million, one hundred thirty-three thousand, one hundred thirty-one".