612121313 has 12 divisors (see below), whose sum is σ = 628374672. Its totient is φ = 596154240.

The previous prime is 612121273. The next prime is 612121387. The reversal of 612121313 is 313121216.

612121313 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 612121313 - 2⁶ = 612121249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612129313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629918 + ... + 630888.

It is an arithmetic number, because the mean of its divisors is an integer number (52364556).

Almost surely, 2^612121313 is an apocalyptic number.

It is an amenable number.

612121313 is a deficient number, since it is larger than the sum of its proper divisors (16253359).

612121313 is an frugal number, since it uses more digits than its factorization.

612121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1135 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 612121313 is about 24741.0855259021. The cubic root of 612121313 is about 849.0745697433.

Adding to 612121313 its reverse (313121216), we get a palindrome (925242529).

The spelling of 612121313 in words is "six hundred twelve million, one hundred twenty-one thousand, three hundred thirteen".