3111213123 has 6 divisors (see below), whose sum is σ = 4493974524. Its totient is φ = 2074142076.

The previous prime is 3111213101. The next prime is 3111213137. The reversal of 3111213123 is 3213121113.

It is a de Polignac number, because none of the positive numbers 2^k-3111213123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3111213096 and 3111213105.

It is not an unprimeable number, because it can be changed into a prime (3111213223) 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, 172845165 + ... + 172845182.

It is an arithmetic number, because the mean of its divisors is an integer number (748995754).

Almost surely, 2^3111213123 is an apocalyptic number.

3111213123 is a deficient number, since it is larger than the sum of its proper divisors (1382761401).

3111213123 is a wasteful number, since it uses less digits than its factorization.

3111213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345690353 (or 345690350 counting only the distinct ones).

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

The square root of 3111213123 is about 55778.2495512364. The cubic root of 3111213123 is about 1459.8556689437.

Adding to 3111213123 its reverse (3213121113), we get a palindrome (6324334236).

The spelling of 3111213123 in words is "three billion, one hundred eleven million, two hundred thirteen thousand, one hundred twenty-three".