3113121213 has 6 divisors (see below), whose sum is σ = 4496730654. Its totient is φ = 2075414136.

The previous prime is 3113121199. The next prime is 3113121217. The reversal of 3113121213 is 3121213113.

It can be written as a sum of positive squares in only one way, i.e., 2362251609 + 750869604 = 48603^2 + 27402^2 .

It is not a de Polignac number, because 3113121213 - 2⁶ = 3113121149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3113121217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172951170 + ... + 172951187.

It is an arithmetic number, because the mean of its divisors is an integer number (749455109).

Almost surely, 2^3113121213 is an apocalyptic number.

It is an amenable number.

3113121213 is a deficient number, since it is larger than the sum of its proper divisors (1383609441).

3113121213 is a wasteful number, since it uses less digits than its factorization.

3113121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345902363 (or 345902360 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 3113121213 is about 55795.3511773158. The cubic root of 3113121213 is about 1460.1540484542.

Adding to 3113121213 its reverse (3121213113), we get a palindrome (6234334326).

The spelling of 3113121213 in words is "three billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred thirteen".