3111121213 has 4 divisors (see below), whose sum is σ = 3133503520. Its totient is φ = 3088738908.

The previous prime is 3111121183. The next prime is 3111121217. The reversal of 3111121213 is 3121211113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111121213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111121217) 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, 11190945 + ... + 11191222.

It is an arithmetic number, because the mean of its divisors is an integer number (783375880).

Almost surely, 2^3111121213 is an apocalyptic number.

It is an amenable number.

3111121213 is a deficient number, since it is larger than the sum of its proper divisors (22382307).

3111121213 is a wasteful number, since it uses less digits than its factorization.

3111121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22382306.

The product of its digits is 36, while the sum is 16.

The square root of 3111121213 is about 55777.4256576978. The cubic root of 3111121213 is about 1459.8412933448.

Adding to 3111121213 its reverse (3121211113), we get a palindrome (6232332326).

The spelling of 3111121213 in words is "three billion, one hundred eleven million, one hundred twenty-one thousand, two hundred thirteen".