3113219721 has 16 divisors (see below), whose sum is σ = 4190468544. Its totient is φ = 2055750144.

The previous prime is 3113219689. The next prime is 3113219723. The reversal of 3113219721 is 1279123113.

It is not a de Polignac number, because 3113219721 - 2⁵ = 3113219689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3113219723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939750 + ... + 943056.

It is an arithmetic number, because the mean of its divisors is an integer number (261904284).

Almost surely, 2^3113219721 is an apocalyptic number.

It is an amenable number.

3113219721 is a deficient number, since it is larger than the sum of its proper divisors (1077248823).

3113219721 is a wasteful number, since it uses less digits than its factorization.

3113219721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200.

The product of its digits is 2268, while the sum is 30.

The square root of 3113219721 is about 55796.2339320496. The cubic root of 3113219721 is about 1460.1694494326.

The spelling of 3113219721 in words is "three billion, one hundred thirteen million, two hundred nineteen thousand, seven hundred twenty-one".