123331312111 has 4 divisors (see below), whose sum is σ = 140950070992. Its totient is φ = 105712553232.

The previous prime is 123331312099. The next prime is 123331312121. The reversal of 123331312111 is 111213133321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111213133321 = 186019 ⋅597859.

It is a cyclic number.

It is not a de Polignac number, because 123331312111 - 2³³ = 114741377519 is a prime.

It is a super-2 number, since 2×123331312111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123331312121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8809379430 + ... + 8809379443.

It is an arithmetic number, because the mean of its divisors is an integer number (35237517748).

Almost surely, 2^123331312111 is an apocalyptic number.

123331312111 is a deficient number, since it is larger than the sum of its proper divisors (17618758881).

123331312111 is an equidigital number, since it uses as much as digits as its factorization.

123331312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17618758880.

The product of its digits is 324, while the sum is 22.

Adding to 123331312111 its reverse (111213133321), we get a palindrome (234544445432).

The spelling of 123331312111 in words is "one hundred twenty-three billion, three hundred thirty-one million, three hundred twelve thousand, one hundred eleven".