3320121991 has 2 divisors, whose sum is σ = 3320121992. Its totient is φ = 3320121990.

The previous prime is 3320121943. The next prime is 3320122027. The reversal of 3320121991 is 1991210233.

It is a strong prime.

It is an emirp because it is prime and its reverse (1991210233) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3320121991 is a prime.

It is a super-2 number, since 2×3320121991² = 22046420070243608162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3320121901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660060995 + 1660060996.

It is an arithmetic number, because the mean of its divisors is an integer number (1660060996).

Almost surely, 2^3320121991 is an apocalyptic number.

3320121991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3320121991 is an equidigital number, since it uses as much as digits as its factorization.

3320121991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 3320121991 is about 57620.4997461841. The cubic root of 3320121991 is about 1491.8254567467.

The spelling of 3320121991 in words is "three billion, three hundred twenty million, one hundred twenty-one thousand, nine hundred ninety-one".