3131322021 has 24 divisors (see below), whose sum is σ = 4799995200. Its totient is φ = 1960273536.

The previous prime is 3131322013. The next prime is 3131322043. The reversal of 3131322021 is 1202231313.

3131322021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3131322021 - 2³ = 3131322013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3131321985 and 3131322003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131322071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44680 + ... + 90878.

It is an arithmetic number, because the mean of its divisors is an integer number (199999800).

Almost surely, 2^3131322021 is an apocalyptic number.

It is an amenable number.

3131322021 is a deficient number, since it is larger than the sum of its proper divisors (1668673179).

3131322021 is a wasteful number, since it uses less digits than its factorization.

3131322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46665 (or 46662 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3131322021 is about 55958.2167424946. The cubic root of 3131322021 is about 1462.9941090917.

Adding to 3131322021 its reverse (1202231313), we get a palindrome (4333553334).

The spelling of 3131322021 in words is "three billion, one hundred thirty-one million, three hundred twenty-two thousand, twenty-one".