3111220312213 has 4 divisors (see below), whose sum is σ = 3350544951628. Its totient is φ = 2871895672800.

The previous prime is 3111220312171. The next prime is 3111220312217. The reversal of 3111220312213 is 3122130221113.

3111220312213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1169118862564 + 1942101449649 = 1081258^2 + 1393593^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111220312213 - 2²⁵ = 3111186757781 is a prime.

It is a super-2 number, since 2×3111220312213² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111220312217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119662319688 + ... + 119662319713.

It is an arithmetic number, because the mean of its divisors is an integer number (837636237907).

Almost surely, 2^{3111220312213} is an apocalyptic number.

It is an amenable number.

3111220312213 is a deficient number, since it is larger than the sum of its proper divisors (239324639415).

3111220312213 is a wasteful number, since it uses less digits than its factorization.

3111220312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239324639414.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 3111220312213 its reverse (3122130221113), we get a palindrome (6233350533326).

The spelling of 3111220312213 in words is "three trillion, one hundred eleven billion, two hundred twenty million, three hundred twelve thousand, two hundred thirteen".