123012320311 has 4 divisors (see below), whose sum is σ = 123013049224. Its totient is φ = 123011591400.

The previous prime is 123012320303. The next prime is 123012320357. The reversal of 123012320311 is 113023210321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 123012320311 - 2³ = 123012320303 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 (123012323311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33616 + ... + 497146.

It is an arithmetic number, because the mean of its divisors is an integer number (30753262306).

Almost surely, 2^123012320311 is an apocalyptic number.

123012320311 is a deficient number, since it is larger than the sum of its proper divisors (728913).

123012320311 is an equidigital number, since it uses as much as digits as its factorization.

123012320311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728912.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123012320311 its reverse (113023210321), we get a palindrome (236035530632).

The spelling of 123012320311 in words is "one hundred twenty-three billion, twelve million, three hundred twenty thousand, three hundred eleven".