123310021099 has 2 divisors, whose sum is σ = 123310021100. Its totient is φ = 123310021098.

The previous prime is 123310021091. The next prime is 123310021157. The reversal of 123310021099 is 990120013321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123310021099 - 2³ = 123310021091 is a prime.

It is a super-2 number, since 2×123310021099² (a number of 23 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 123310021099.

It is not a weakly prime, because it can be changed into another prime (123310021091) 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, 61655010549 + 61655010550.

It is an arithmetic number, because the mean of its divisors is an integer number (61655010550).

Almost surely, 2^123310021099 is an apocalyptic number.

123310021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

123310021099 is an equidigital number, since it uses as much as digits as its factorization.

123310021099 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 spelling of 123310021099 in words is "one hundred twenty-three billion, three hundred ten million, twenty-one thousand, ninety-nine".