3121333299949 has 2 divisors, whose sum is σ = 3121333299950. Its totient is φ = 3121333299948.

The previous prime is 3121333299947. The next prime is 3121333300079. The reversal of 3121333299949 is 9499923331213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2942535405924 + 178797894025 = 1715382^2 + 422845^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121333299949 - 2¹ = 3121333299947 is a prime.

Together with 3121333299947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3121333299893 and 3121333299902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121333299947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560666649974 + 1560666649975.

It is an arithmetic number, because the mean of its divisors is an integer number (1560666649975).

Almost surely, 2^{3121333299949} is an apocalyptic number.

It is an amenable number.

3121333299949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121333299949 is an equidigital number, since it uses as much as digits as its factorization.

3121333299949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8503056, while the sum is 58.

The spelling of 3121333299949 in words is "three trillion, one hundred twenty-one billion, three hundred thirty-three million, two hundred ninety-nine thousand, nine hundred forty-nine".