3121320212 has 24 divisors (see below), whose sum is σ = 5488603680. Its totient is φ = 1553165280.

The previous prime is 3121320211. The next prime is 3121320227. The reversal of 3121320212 is 2120231213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121320211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935387 + ... + 938717.

It is an arithmetic number, because the mean of its divisors is an integer number (228691820).

Almost surely, 2^3121320212 is an apocalyptic number.

It is an amenable number.

3121320212 is a deficient number, since it is larger than the sum of its proper divisors (2367283468).

3121320212 is a wasteful number, since it uses less digits than its factorization.

3121320212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391 (or 4389 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3121320212 is about 55868.7767183066. The cubic root of 3121320212 is about 1461.4347895612.

Adding to 3121320212 its reverse (2120231213), we get a palindrome (5241551425).

The spelling of 3121320212 in words is "three billion, one hundred twenty-one million, three hundred twenty thousand, two hundred twelve".