123042311 has 16 divisors (see below), whose sum is σ = 149299200. Its totient is φ = 98989440.

The previous prime is 123042281. The next prime is 123042349. The reversal of 123042311 is 113240321.

It is a cyclic number.

It is not a de Polignac number, because 123042311 - 2¹⁴ = 123025927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123042311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50090 + ... + 52488.

It is an arithmetic number, because the mean of its divisors is an integer number (9331200).

Almost surely, 2^123042311 is an apocalyptic number.

123042311 is a deficient number, since it is larger than the sum of its proper divisors (26256889).

123042311 is a wasteful number, since it uses less digits than its factorization.

123042311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123042311 is about 11092.4438695898. The cubic root of 123042311 is about 497.3760013518.

Adding to 123042311 its reverse (113240321), we get a palindrome (236282632).

The spelling of 123042311 in words is "one hundred twenty-three million, forty-two thousand, three hundred eleven".