3121212130 has 16 divisors (see below), whose sum is σ = 5623949880. Its totient is φ = 1247203072.

The previous prime is 3121212113. The next prime is 3121212139. The reversal of 3121212130 is 312121213.

3121212130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3087024721 + 34187409 = 55561^2 + 5847^2 .

It is not an unprimeable number, because it can be changed into a prime (3121212139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149965 + ... + 169504.

Almost surely, 2^3121212130 is an apocalyptic number.

3121212130 is a deficient number, since it is larger than the sum of its proper divisors (2502737750).

3121212130 is a wasteful number, since it uses less digits than its factorization.

3121212130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320453.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3121212130 is about 55867.8094254643. The cubic root of 3121212130 is about 1461.4179209920.

Adding to 3121212130 its reverse (312121213), we get a palindrome (3433333343).

The spelling of 3121212130 in words is "three billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirty".