21232123032031 has 4 divisors (see below), whose sum is σ = 21232133797392. Its totient is φ = 21232112266672.

The previous prime is 21232123031989. The next prime is 21232123032083. The reversal of 21232123032031 is 13023032123212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21232123032031 is a prime.

It is a super-2 number, since 2×21232123032031² (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 = 21232123031987 and 21232123032005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232123032091) 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, 1482091 + ... + 6682876.

It is an arithmetic number, because the mean of its divisors is an integer number (5308033449348).

Almost surely, 2^{21232123032031} is an apocalyptic number.

21232123032031 is a deficient number, since it is larger than the sum of its proper divisors (10765361).

21232123032031 is an equidigital number, since it uses as much as digits as its factorization.

21232123032031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10765360.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21232123032031 its reverse (13023032123212), we get a palindrome (34255155155243).

The spelling of 21232123032031 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty-three million, thirty-two thousand, thirty-one".