21232123433031 has 16 divisors (see below), whose sum is σ = 32353847677184. Its totient is φ = 12132591044544.

The previous prime is 21232123432999. The next prime is 21232123433047. The reversal of 21232123433031 is 13033432123212.

It is not a de Polignac number, because 21232123433031 - 2⁵ = 21232123432999 is a prime.

It is a super-2 number, since 2×21232123433031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21232123433031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232123433431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326916 + ... + 7316598.

It is an arithmetic number, because the mean of its divisors is an integer number (2022115479824).

Almost surely, 2^{21232123433031} is an apocalyptic number.

21232123433031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21232123433031 is a deficient number, since it is larger than the sum of its proper divisors (11121724244153).

21232123433031 is a wasteful number, since it uses less digits than its factorization.

21232123433031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243110.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 21232123433031 its reverse (13033432123212), we get a palindrome (34265555556243).

The spelling of 21232123433031 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty-three million, four hundred thirty-three thousand, thirty-one".