12331122021 has 16 divisors (see below), whose sum is σ = 18320094720. Its totient is φ = 8197453440.

The previous prime is 12331122019. The next prime is 12331122029. The reversal of 12331122021 is 12022113321.

It is not a de Polignac number, because 12331122021 - 2¹ = 12331122019 is a prime.

It is a super-2 number, since 2×12331122021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12331121985 and 12331122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331122029) 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, 637365 + ... + 656426.

It is an arithmetic number, because the mean of its divisors is an integer number (1145005920).

Almost surely, 2^12331122021 is an apocalyptic number.

It is an amenable number.

12331122021 is a deficient number, since it is larger than the sum of its proper divisors (5988972699).

12331122021 is a wasteful number, since it uses less digits than its factorization.

12331122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294153 (or 1294147 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12331122021 its reverse (12022113321), we get a palindrome (24353235342).

The spelling of 12331122021 in words is "twelve billion, three hundred thirty-one million, one hundred twenty-two thousand, twenty-one".