3121321129919 has 2 divisors, whose sum is σ = 3121321129920. Its totient is φ = 3121321129918.

The previous prime is 3121321129877. The next prime is 3121321129961. The reversal of 3121321129919 is 9199211231213.

It is a balanced prime because it is at equal distance from previous prime (3121321129877) and next prime (3121321129961).

It is an emirp because it is prime and its reverse (9199211231213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121321129919 - 2³⁶ = 3052601653183 is a prime.

It is a super-2 number, since 2×3121321129919² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3121321129919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121321129319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560660564959 + 1560660564960.

It is an arithmetic number, because the mean of its divisors is an integer number (1560660564960).

Almost surely, 2^{3121321129919} is an apocalyptic number.

3121321129919 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121321129919 is an equidigital number, since it uses as much as digits as its factorization.

3121321129919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 44.

The spelling of 3121321129919 in words is "three trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-nine thousand, nine hundred nineteen".