3121120349 has 2 divisors, whose sum is σ = 3121120350. Its totient is φ = 3121120348.

The previous prime is 3121120319. The next prime is 3121120361. The reversal of 3121120349 is 9430211213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2189772025 + 931348324 = 46795^2 + 30518^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121120349 - 2¹² = 3121116253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121120319) 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, 1560560174 + 1560560175.

It is an arithmetic number, because the mean of its divisors is an integer number (1560560175).

Almost surely, 2^3121120349 is an apocalyptic number.

It is an amenable number.

3121120349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121120349 is an equidigital number, since it uses as much as digits as its factorization.

3121120349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 3121120349 is about 55866.9880072302. The cubic root of 3121120349 is about 1461.4035962460.

The spelling of 3121120349 in words is "three billion, one hundred twenty-one million, one hundred twenty thousand, three hundred forty-nine".