131321101212 has 72 divisors (see below), whose sum is σ = 385034389376. Its totient is φ = 36960305184.

The previous prime is 131321101189. The next prime is 131321101229. The reversal of 131321101212 is 212101123131.

131321101212 is a `hidden beast` number, since 1 + 31 + 321 + 101 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3872038 + ... + 3905805.

Almost surely, 2^131321101212 is an apocalyptic number.

131321101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131321101212 is an abundant number, since it is smaller than the sum of its proper divisors (253713288164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131321101212 is a wasteful number, since it uses less digits than its factorization.

131321101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777927 (or 7777922 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131321101212 its reverse (212101123131), we get a palindrome (343422224343).

The spelling of 131321101212 in words is "one hundred thirty-one billion, three hundred twenty-one million, one hundred one thousand, two hundred twelve".