131323212220 has 24 divisors (see below), whose sum is σ = 276803956800. Its totient is φ = 52334006592.

The previous prime is 131323212179. The next prime is 131323212271. The reversal of 131323212220 is 22212323131.

It is a junction number, because it is equal to n+sod(n) for n = 131323212191 and 131323212200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12199380 + ... + 12210139.

It is an arithmetic number, because the mean of its divisors is an integer number (11533498200).

Almost surely, 2^131323212220 is an apocalyptic number.

131323212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131323212220 is an abundant number, since it is smaller than the sum of its proper divisors (145480744580).

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

131323212220 is a wasteful number, since it uses less digits than its factorization.

131323212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24409797 (or 24409795 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 131323212220 its reverse (22212323131), we get a palindrome (153535535351).

The spelling of 131323212220 in words is "one hundred thirty-one billion, three hundred twenty-three million, two hundred twelve thousand, two hundred twenty".