131131210020 has 48 divisors (see below), whose sum is σ = 369031215168. Its totient is φ = 34790815360.

The previous prime is 131131209977. The next prime is 131131210061. The reversal of 131131210020 is 20012131131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5535186 + ... + 5558825.

It is an arithmetic number, because the mean of its divisors is an integer number (7688150316).

Almost surely, 2^131131210020 is an apocalyptic number.

131131210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131131210020 is an abundant number, since it is smaller than the sum of its proper divisors (237900005148).

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

131131210020 is a wasteful number, since it uses less digits than its factorization.

131131210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11094220 (or 11094218 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131131210020 its reverse (20012131131), we get a palindrome (151143341151).

The spelling of 131131210020 in words is "one hundred thirty-one billion, one hundred thirty-one million, two hundred ten thousand, twenty".