3111201257 has 2 divisors, whose sum is σ = 3111201258. Its totient is φ = 3111201256.

The previous prime is 3111201221. The next prime is 3111201271. The reversal of 3111201257 is 7521021113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2756670016 + 354531241 = 52504^2 + 18829^2 .

It is an emirp because it is prime and its reverse (7521021113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3111201257 - 2⁸ = 3111201001 is a prime.

It is not a weakly prime, because it can be changed into another prime (3111206257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555600628 + 1555600629.

It is an arithmetic number, because the mean of its divisors is an integer number (1555600629).

Almost surely, 2^3111201257 is an apocalyptic number.

It is an amenable number.

3111201257 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111201257 is an equidigital number, since it uses as much as digits as its factorization.

3111201257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 3111201257 is about 55778.1431835087. The cubic root of 3111201257 is about 1459.8538130043.

The spelling of 3111201257 in words is "three billion, one hundred eleven million, two hundred one thousand, two hundred fifty-seven".