3121331213 has 40 divisors (see below), whose sum is σ = 4278404256. Its totient is φ = 2244866400.

The previous prime is 3121331203. The next prime is 3121331243.

3121331213 is nontrivially palindromic in base 10.

3121331213 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 3121331213 - 2⁶ = 3121331149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121331203) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 338798 + ... + 347888.

Almost surely, 2^3121331213 is an apocalyptic number.

It is an amenable number.

3121331213 is a deficient number, since it is larger than the sum of its proper divisors (1157073043).

3121331213 is an equidigital number, since it uses as much as digits as its factorization.

3121331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143 (or 9122 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 3121331213 is about 55868.8751721386. The cubic root of 3121331213 is about 1461.4365064870.

It can be divided in two parts, 31213 and 31213, that added together give a palindrome (62426).

The spelling of 3121331213 in words is "three billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirteen".