131212012021020 has 144 divisors (see below), whose sum is σ = 456908077516800. Its totient is φ = 29856826758528.

The previous prime is 131212012021009. The next prime is 131212012021099. The reversal of 131212012021020 is 20120210212131.

131212012021020 is a `hidden beast` number, since 1 + 312 + 1 + 2 + 0 + 120 + 210 + 20 = 666.

131212012021020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131212012020984 and 131212012021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233208970 + ... + 233770929.

Almost surely, 2^{131212012021020} is an apocalyptic number.

131212012021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131212012021020 is an abundant number, since it is smaller than the sum of its proper divisors (325696065495780).

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

131212012021020 is a wasteful number, since it uses less digits than its factorization.

131212012021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466980144 (or 466980139 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 131212012021020 its reverse (20120210212131), we get a palindrome (151332222233151).

The spelling of 131212012021020 in words is "one hundred thirty-one trillion, two hundred twelve billion, twelve million, twenty-one thousand, twenty".