3113123021 has 4 divisors (see below), whose sum is σ = 3113246844. Its totient is φ = 3112999200.

The previous prime is 3113123017. The next prime is 3113123029. The reversal of 3113123021 is 1203213113.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1724740900 + 1388382121 = 41530^2 + 37261^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113123021 - 2² = 3113123017 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 (3113123029) 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 3 ways as a sum of consecutive naturals, for example, 9290 + ... + 79451.

It is an arithmetic number, because the mean of its divisors is an integer number (778311711).

Almost surely, 2^3113123021 is an apocalyptic number.

It is an amenable number.

3113123021 is a deficient number, since it is larger than the sum of its proper divisors (123823).

3113123021 is an equidigital number, since it uses as much as digits as its factorization.

3113123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123822.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 3113123021 is about 55795.3673793802. The cubic root of 3113123021 is about 1460.1543311242.

Adding to 3113123021 its reverse (1203213113), we get a palindrome (4316336134).

The spelling of 3113123021 in words is "three billion, one hundred thirteen million, one hundred twenty-three thousand, twenty-one".