3122113021 has 4 divisors (see below), whose sum is σ = 3206494492. Its totient is φ = 3037731552.

The previous prime is 3122112991. The next prime is 3122113063. The reversal of 3122113021 is 1203112213.

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 2007488025 + 1114624996 = 44805^2 + 33386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3122113021 - 2⁷ = 3122112893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3122112986 and 3122113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122116021) 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, 42190680 + ... + 42190753.

It is an arithmetic number, because the mean of its divisors is an integer number (801623623).

Almost surely, 2^3122113021 is an apocalyptic number.

It is an amenable number.

3122113021 is a deficient number, since it is larger than the sum of its proper divisors (84381471).

3122113021 is an equidigital number, since it uses as much as digits as its factorization.

3122113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84381470.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3122113021 is about 55875.8715457755. The cubic root of 3122113021 is about 1461.5585129103.

Adding to 3122113021 its reverse (1203112213), we get a palindrome (4325225234).

The spelling of 3122113021 in words is "three billion, one hundred twenty-two million, one hundred thirteen thousand, twenty-one".