12212331131 has 32 divisors (see below), whose sum is σ = 16407648768. Its totient is φ = 8778378240.

The previous prime is 12212331107. The next prime is 12212331169. The reversal of 12212331131 is 13113321221.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212331131 is a prime.

It is a super-2 number, since 2×12212331131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12212331101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2082155 + ... + 2088011.

It is an arithmetic number, because the mean of its divisors is an integer number (512739024).

Almost surely, 2^12212331131 is an apocalyptic number.

12212331131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12212331131 is a deficient number, since it is larger than the sum of its proper divisors (4195317637).

12212331131 is a wasteful number, since it uses less digits than its factorization.

12212331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971.

The product of its digits is 216, while the sum is 20.

Adding to 12212331131 its reverse (13113321221), we get a palindrome (25325652352).

It can be divided in two parts, 12212 and 331131, that added together give a palindrome (343343).

The spelling of 12212331131 in words is "twelve billion, two hundred twelve million, three hundred thirty-one thousand, one hundred thirty-one".