131021131020 has 96 divisors (see below), whose sum is σ = 395209053120. Its totient is φ = 32240747520.

The previous prime is 131021130941. The next prime is 131021131027. The reversal of 131021131020 is 20131120131.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (131021131027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2492610 + ... + 2544630.

It is an arithmetic number, because the mean of its divisors is an integer number (4116760970).

Almost surely, 2^131021131020 is an apocalyptic number.

131021131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131021131020 is an abundant number, since it is smaller than the sum of its proper divisors (264187922100).

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

131021131020 is a wasteful number, since it uses less digits than its factorization.

131021131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55275 (or 55273 counting only the distinct ones).

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

Adding to 131021131020 its reverse (20131120131), we get a palindrome (151152251151).

The spelling of 131021131020 in words is "one hundred thirty-one billion, twenty-one million, one hundred thirty-one thousand, twenty".