123123311 has 2 divisors, whose sum is σ = 123123312. Its totient is φ = 123123310.

The previous prime is 123123307. The next prime is 123123323. The reversal of 123123311 is 113321321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123123311 - 2² = 123123307 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123123311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123123391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61561655 + 61561656.

It is an arithmetic number, because the mean of its divisors is an integer number (61561656).

Almost surely, 2^123123311 is an apocalyptic number.

123123311 is a deficient number, since it is larger than the sum of its proper divisors (1).

123123311 is an equidigital number, since it uses as much as digits as its factorization.

123123311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 123123311 is about 11096.0944029870. The cubic root of 123123311 is about 497.4851199644.

Adding to 123123311 its reverse (113321321), we get a palindrome (236444632).

It can be divided in two parts, 1231 and 23311, that added together give a palindrome (24542).

The spelling of 123123311 in words is "one hundred twenty-three million, one hundred twenty-three thousand, three hundred eleven".