91213330099 has 2 divisors, whose sum is σ = 91213330100. Its totient is φ = 91213330098.

The previous prime is 91213330049. The next prime is 91213330127. The reversal of 91213330099 is 99003331219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91213330099 - 2⁹ = 91213329587 is a prime.

It is not a weakly prime, because it can be changed into another prime (91213330009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45606665049 + 45606665050.

It is an arithmetic number, because the mean of its divisors is an integer number (45606665050).

Almost surely, 2^91213330099 is an apocalyptic number.

91213330099 is a deficient number, since it is larger than the sum of its proper divisors (1).

91213330099 is an equidigital number, since it uses as much as digits as its factorization.

91213330099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 40.

The spelling of 91213330099 in words is "ninety-one billion, two hundred thirteen million, three hundred thirty thousand, ninety-nine".