131002131020 has 24 divisors (see below), whose sum is σ = 278873032704. Its totient is φ = 51683031936.

The previous prime is 131002131011. The next prime is 131002131023. The reversal of 131002131020 is 20131200131.

It is a junction number, because it is equal to n+sod(n) for n = 131002130986 and 131002131004.

It is not an unprimeable number, because it can be changed into a prime (131002131023) 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, 44862284 + ... + 44865203.

It is an arithmetic number, because the mean of its divisors is an integer number (11619709696).

Almost surely, 2^131002131020 is an apocalyptic number.

131002131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131002131020 is an abundant number, since it is smaller than the sum of its proper divisors (147870901684).

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

131002131020 is a wasteful number, since it uses less digits than its factorization.

131002131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89727569 (or 89727567 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 131002131020 its reverse (20131200131), we get a palindrome (151133331151).

The spelling of 131002131020 in words is "one hundred thirty-one billion, two million, one hundred thirty-one thousand, twenty".