2130218023991 has 2 divisors, whose sum is σ = 2130218023992. Its totient is φ = 2130218023990.

The previous prime is 2130218023961. The next prime is 2130218024003. The reversal of 2130218023991 is 1993208120312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2130218023991 - 2³⁸ = 1855340117047 is a prime.

It is a super-2 number, since 2×2130218023991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130218023961) 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, 1065109011995 + 1065109011996.

It is an arithmetic number, because the mean of its divisors is an integer number (1065109011996).

Almost surely, 2^{2130218023991} is an apocalyptic number.

2130218023991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130218023991 is an equidigital number, since it uses as much as digits as its factorization.

2130218023991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 2130218023991 in words is "two trillion, one hundred thirty billion, two hundred eighteen million, twenty-three thousand, nine hundred ninety-one".