999233231111 has 4 divisors (see below), whose sum is σ = 1020493512672. Its totient is φ = 977972949552.

The previous prime is 999233231107. The next prime is 999233231119. The reversal of 999233231111 is 111132332999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111132332999 = 239 ⋅464988841.

It is a cyclic number.

It is not a de Polignac number, because 999233231111 - 2² = 999233231107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999233231119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10630140710 + ... + 10630140803.

It is an arithmetic number, because the mean of its divisors is an integer number (255123378168).

Almost surely, 2^999233231111 is an apocalyptic number.

999233231111 is a deficient number, since it is larger than the sum of its proper divisors (21260281561).

999233231111 is a wasteful number, since it uses less digits than its factorization.

999233231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260281560.

The product of its digits is 78732, while the sum is 44.

The spelling of 999233231111 in words is "nine hundred ninety-nine billion, two hundred thirty-three million, two hundred thirty-one thousand, one hundred eleven".