131312100231220 has 24 divisors (see below), whose sum is σ = 277447161477024. Its totient is φ = 52202601808416.

The previous prime is 131312100231149. The next prime is 131312100231229. The reversal of 131312100231220 is 22132001213131.

It is a junction number, because it is equal to n+sod(n) for n = 131312100231191 and 131312100231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312100231229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20139889414 + ... + 20139895933.

It is an arithmetic number, because the mean of its divisors is an integer number (11560298394876).

Almost surely, 2^{131312100231220} is an apocalyptic number.

131312100231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131312100231220 is an abundant number, since it is smaller than the sum of its proper divisors (146135061245804).

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

131312100231220 is a wasteful number, since it uses less digits than its factorization.

131312100231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40279785519 (or 40279785517 counting only the distinct ones).

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

Adding to 131312100231220 its reverse (22132001213131), we get a palindrome (153444101444351).

The spelling of 131312100231220 in words is "one hundred thirty-one trillion, three hundred twelve billion, one hundred million, two hundred thirty-one thousand, two hundred twenty".