131101020020 has 12 divisors (see below), whose sum is σ = 275312142084. Its totient is φ = 52440408000.

The previous prime is 131101019927. The next prime is 131101020049. The reversal of 131101020020 is 20020101131.

It can be written as a sum of positive squares in 2 ways, for example, as 102884411536 + 28216608484 = 320756^2 + 167978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131101019983 and 131101020010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277525481 + ... + 3277525520.

It is an arithmetic number, because the mean of its divisors is an integer number (22942678507).

Almost surely, 2^131101020020 is an apocalyptic number.

131101020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131101020020 is an abundant number, since it is smaller than the sum of its proper divisors (144211122064).

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

131101020020 is a wasteful number, since it uses less digits than its factorization.

131101020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6555051010 (or 6555051008 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 131101020020 its reverse (20020101131), we get a palindrome (151121121151).

The spelling of 131101020020 in words is "one hundred thirty-one billion, one hundred one million, twenty thousand, twenty".