131123231212 has 12 divisors (see below), whose sum is σ = 236867772736. Its totient is φ = 63446724720.

The previous prime is 131123231203. The next prime is 131123231221. The reversal of 131123231212 is 212132321131.

It is an interprime number because it is at equal distance from previous prime (131123231203) and next prime (131123231221).

It is a super-2 number, since 2×131123231212² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528722583 + ... + 528722830.

Almost surely, 2^131123231212 is an apocalyptic number.

It is an amenable number.

131123231212 is a deficient number, since it is larger than the sum of its proper divisors (105744541524).

131123231212 is a wasteful number, since it uses less digits than its factorization.

131123231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057445448 (or 1057445446 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 131123231212 its reverse (212132321131), we get a palindrome (343255552343).

The spelling of 131123231212 in words is "one hundred thirty-one billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred twelve".