3131101020 has 24 divisors (see below), whose sum is σ = 8767083024. Its totient is φ = 834960256.

The previous prime is 3131101019. The next prime is 3131101069. The reversal of 3131101020 is 201011313.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 3131100987 and 3131101005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26092449 + ... + 26092568.

It is an arithmetic number, because the mean of its divisors is an integer number (365295126).

Almost surely, 2^3131101020 is an apocalyptic number.

3131101020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131101020 is an abundant number, since it is smaller than the sum of its proper divisors (5635982004).

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

3131101020 is a wasteful number, since it uses less digits than its factorization.

3131101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52185029 (or 52185027 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 3131101020 is about 55956.2420110572. The cubic root of 3131101020 is about 1462.9596901077.

Adding to 3131101020 its reverse (201011313), we get a palindrome (3332112333).

The spelling of 3131101020 in words is "three billion, one hundred thirty-one million, one hundred one thousand, twenty".