131213412020 has 24 divisors (see below), whose sum is σ = 276025742664. Its totient is φ = 52394397696.

The previous prime is 131213411941. The next prime is 131213412037. The reversal of 131213412020 is 20214312131.

It can be written as a sum of positive squares in 4 ways, for example, as 34072729744 + 97140682276 = 184588^2 + 311674^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131213411983 and 131213412001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5673617 + ... + 5696696.

It is an arithmetic number, because the mean of its divisors is an integer number (11501072611).

Almost surely, 2^131213412020 is an apocalyptic number.

131213412020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131213412020 is an abundant number, since it is smaller than the sum of its proper divisors (144812330644).

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

131213412020 is a wasteful number, since it uses less digits than its factorization.

131213412020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370899 (or 11370897 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131213412020 its reverse (20214312131), we get a palindrome (151427724151).

The spelling of 131213412020 in words is "one hundred thirty-one billion, two hundred thirteen million, four hundred twelve thousand, twenty".