3123125321 has 2 divisors, whose sum is σ = 3123125322. Its totient is φ = 3123125320.

The previous prime is 3123125297. The next prime is 3123125339. The reversal of 3123125321 is 1235213213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2544193600 + 578931721 = 50440^2 + 24061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3123125321 is a prime.

It is not a weakly prime, because it can be changed into another prime (3123121321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561562660 + 1561562661.

It is an arithmetic number, because the mean of its divisors is an integer number (1561562661).

Almost surely, 2^3123125321 is an apocalyptic number.

It is an amenable number.

3123125321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123125321 is an equidigital number, since it uses as much as digits as its factorization.

3123125321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 3123125321 is about 55884.9292833050. The cubic root of 3123125321 is about 1461.7164589120.

Adding to 3123125321 its reverse (1235213213), we get a palindrome (4358338534).

The spelling of 3123125321 in words is "three billion, one hundred twenty-three million, one hundred twenty-five thousand, three hundred twenty-one".