131021031020 has 48 divisors (see below), whose sum is σ = 302069180448. Its totient is φ = 47340533760.

The previous prime is 131021030999. The next prime is 131021031073. The reversal of 131021031020 is 20130120131.

It is a junction number, because it is equal to n+sod(n) for n = 131021030986 and 131021031004.

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, 1862117 + ... + 1931196.

It is an arithmetic number, because the mean of its divisors is an integer number (6293107926).

Almost surely, 2^131021031020 is an apocalyptic number.

131021031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131021031020 is an abundant number, since it is smaller than the sum of its proper divisors (171048149428).

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

131021031020 is a wasteful number, since it uses less digits than its factorization.

131021031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793490 (or 3793488 counting only the distinct ones).

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

Adding to 131021031020 its reverse (20130120131), we get a palindrome (151151151151).

The spelling of 131021031020 in words is "one hundred thirty-one billion, twenty-one million, thirty-one thousand, twenty".