131220423992 has 16 divisors (see below), whose sum is σ = 281186622960. Its totient is φ = 56237324544.

The previous prime is 131220423991. The next prime is 131220424001. The reversal of 131220423992 is 299324022131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220423991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171610873 + ... + 1171610984.

It is an arithmetic number, because the mean of its divisors is an integer number (17574163935).

Almost surely, 2^131220423992 is an apocalyptic number.

It is an amenable number.

131220423992 is an abundant number, since it is smaller than the sum of its proper divisors (149966198968).

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

131220423992 is a wasteful number, since it uses less digits than its factorization.

131220423992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343221870 (or 2343221866 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 131220423992 in words is "one hundred thirty-one billion, two hundred twenty million, four hundred twenty-three thousand, nine hundred ninety-two".