131231110212 has 144 divisors (see below), whose sum is σ = 355216942080. Its totient is φ = 40750928064.

The previous prime is 131231110183. The next prime is 131231110237. The reversal of 131231110212 is 212011132131.

131231110212 is a `hidden beast` number, since 1 + 312 + 31 + 110 + 212 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12776703 + ... + 12786969.

It is an arithmetic number, because the mean of its divisors is an integer number (2466784320).

Almost surely, 2^131231110212 is an apocalyptic number.

131231110212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131231110212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177608471040).

131231110212 is an abundant number, since it is smaller than the sum of its proper divisors (223985831868).

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

131231110212 is a wasteful number, since it uses less digits than its factorization.

131231110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10702 (or 10697 counting only the distinct ones).

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

Adding to 131231110212 its reverse (212011132131), we get a palindrome (343242242343).

The spelling of 131231110212 in words is "one hundred thirty-one billion, two hundred thirty-one million, one hundred ten thousand, two hundred twelve".