3121112220349 has 2 divisors, whose sum is σ = 3121112220350. Its totient is φ = 3121112220348.

The previous prime is 3121112220323. The next prime is 3121112220419. The reversal of 3121112220349 is 9430222111213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2434592261124 + 686519959225 = 1560318^2 + 828565^2 .

It is an emirp because it is prime and its reverse (9430222111213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121112220349 - 2¹⁹ = 3121111696061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3121112220349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121112020349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560556110174 + 1560556110175.

It is an arithmetic number, because the mean of its divisors is an integer number (1560556110175).

Almost surely, 2^{3121112220349} is an apocalyptic number.

It is an amenable number.

3121112220349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121112220349 is an equidigital number, since it uses as much as digits as its factorization.

3121112220349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 3121112220349 in words is "three trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand, three hundred forty-nine".