131111112331212 has 96 divisors (see below), whose sum is σ = 331997829035712. Its totient is φ = 40031204438016.

The previous prime is 131111112331201. The next prime is 131111112331217. The reversal of 131111112331212 is 212133211111131.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (131111112331217) 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, 51612618 + ... + 54093294.

It is an arithmetic number, because the mean of its divisors is an integer number (3458310719122).

Almost surely, 2^{131111112331212} is an apocalyptic number.

131111112331212 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 131111112331212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165998914517856).

131111112331212 is an abundant number, since it is smaller than the sum of its proper divisors (200886716704500).

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

131111112331212 is a wasteful number, since it uses less digits than its factorization.

131111112331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483307 (or 2483305 counting only the distinct ones).

The product of its digits is 216, while the sum is 24.

Adding to 131111112331212 its reverse (212133211111131), we get a palindrome (343244323442343).

The spelling of 131111112331212 in words is "one hundred thirty-one trillion, one hundred eleven billion, one hundred twelve million, three hundred thirty-one thousand, two hundred twelve".