21132332311 has 4 divisors (see below), whose sum is σ = 22051129392. Its totient is φ = 20213535232.

The previous prime is 21132332281. The next prime is 21132332317. The reversal of 21132332311 is 11323323112.

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

It is a cyclic number.

It is not a de Polignac number, because 21132332311 - 2²⁷ = 20998114583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132332317) 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, 459398506 + ... + 459398551.

It is an arithmetic number, because the mean of its divisors is an integer number (5512782348).

Almost surely, 2^21132332311 is an apocalyptic number.

21132332311 is a deficient number, since it is larger than the sum of its proper divisors (918797081).

21132332311 is an equidigital number, since it uses as much as digits as its factorization.

21132332311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918797080.

The product of its digits is 648, while the sum is 22.

Adding to 21132332311 its reverse (11323323112), we get a palindrome (32455655423).

It can be divided in two parts, 2 and 1132332311, that multiplied together give a palindrome (2264664622).

The spelling of 21132332311 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirty-two thousand, three hundred eleven".