3131030321020 has 36 divisors (see below), whose sum is σ = 7648659786600. Its totient is φ = 1073496109728.

The previous prime is 3131030321011. The next prime is 3131030321057. The reversal of 3131030321020 is 201230301313.

It is a super-2 number, since 2×3131030321020² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1597463470 + ... + 1597465429.

It is an arithmetic number, because the mean of its divisors is an integer number (212462771850).

Almost surely, 2^{3131030321020} is an apocalyptic number.

It is an amenable number.

3131030321020 is an abundant number, since it is smaller than the sum of its proper divisors (4517629465580).

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

3131030321020 is a wasteful number, since it uses less digits than its factorization.

3131030321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3194928922 (or 3194928913 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 3131030321020 its reverse (201230301313), we get a palindrome (3332260622333).

The spelling of 3131030321020 in words is "three trillion, one hundred thirty-one billion, thirty million, three hundred twenty-one thousand, twenty".