3121111349 has 2 divisors, whose sum is σ = 3121111350. Its totient is φ = 3121111348.

The previous prime is 3121111321. The next prime is 3121111373. The reversal of 3121111349 is 9431111213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2384368900 + 736742449 = 48830^2 + 27143^2 .

It is an emirp because it is prime and its reverse (9431111213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121111349 - 2²⁰ = 3120062773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121111849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560555674 + 1560555675.

It is an arithmetic number, because the mean of its divisors is an integer number (1560555675).

Almost surely, 2^3121111349 is an apocalyptic number.

It is an amenable number.

3121111349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121111349 is an equidigital number, since it uses as much as digits as its factorization.

3121111349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 3121111349 is about 55866.9074587094. The cubic root of 3121111349 is about 1461.4021915533.

The spelling of 3121111349 in words is "three billion, one hundred twenty-one million, one hundred eleven thousand, three hundred forty-nine".