12031322312021 has 4 divisors (see below), whose sum is σ = 12050822024652. Its totient is φ = 12011822599392.

The previous prime is 12031322311999. The next prime is 12031322312041. The reversal of 12031322312021 is 12021322313021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 215259809521 + 11816062502500 = 463961^2 + 3437450^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031322312021 - 2²⁶ = 12031255203157 is a prime.

It is a super-2 number, since 2×12031322312021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031322312041) 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, 9749855390 + ... + 9749856623.

It is an arithmetic number, because the mean of its divisors is an integer number (3012705506163).

Almost surely, 2^{12031322312021} is an apocalyptic number.

It is an amenable number.

12031322312021 is a deficient number, since it is larger than the sum of its proper divisors (19499712631).

12031322312021 is an equidigital number, since it uses as much as digits as its factorization.

12031322312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19499712630.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 12031322312021 its reverse (12021322313021), we get a palindrome (24052644625042).

It can be divided in two parts, 1203132 and 2312021, that added together give a palindrome (3515153).

The spelling of 12031322312021 in words is "twelve trillion, thirty-one billion, three hundred twenty-two million, three hundred twelve thousand, twenty-one".