3131011312020 has 72 divisors (see below), whose sum is σ = 9504804175776. Its totient is φ = 834285519552.

The previous prime is 3131011311997. The next prime is 3131011312129. The reversal of 3131011312020 is 202131101313.

3131011312020 is a `hidden beast` number, since 31 + 310 + 11 + 312 + 0 + 2 + 0 = 666.

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 = 3131011311984 and 3131011312002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6547902 + ... + 7009781.

It is an arithmetic number, because the mean of its divisors is an integer number (132011169108).

Almost surely, 2^{3131011312020} is an apocalyptic number.

3131011312020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131011312020 is an abundant number, since it is smaller than the sum of its proper divisors (6373792863756).

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

3131011312020 is a wasteful number, since it uses less digits than its factorization.

3131011312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558981 (or 13558976 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 3131011312020 its reverse (202131101313), we get a palindrome (3333142413333).

The spelling of 3131011312020 in words is "three trillion, one hundred thirty-one billion, eleven million, three hundred twelve thousand, twenty".