123011003310991 has 2 divisors, whose sum is σ = 123011003310992. Its totient is φ = 123011003310990.

The previous prime is 123011003310883. The next prime is 123011003311013. The reversal of 123011003310991 is 199013300110321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123011003310991 - 2¹¹ = 123011003308943 is a prime.

It is a super-2 number, since 2×123011003310991² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123011003311991) 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, 61505501655495 + 61505501655496.

It is an arithmetic number, because the mean of its divisors is an integer number (61505501655496).

Almost surely, 2^{123011003310991} is an apocalyptic number.

123011003310991 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011003310991 is an equidigital number, since it uses as much as digits as its factorization.

123011003310991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The spelling of 123011003310991 in words is "one hundred twenty-three trillion, eleven billion, three million, three hundred ten thousand, nine hundred ninety-one".