123012131311 has 4 divisors (see below), whose sum is σ = 124206423952. Its totient is φ = 121817838672.

The previous prime is 123012131251. The next prime is 123012131317. The reversal of 123012131311 is 113131210321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113131210321 = 274019 ⋅412859.

It is a cyclic number.

It is not a de Polignac number, because 123012131311 - 2¹³ = 123012123119 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 (123012131317) 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, 597146166 + ... + 597146371.

It is an arithmetic number, because the mean of its divisors is an integer number (31051605988).

Almost surely, 2^123012131311 is an apocalyptic number.

123012131311 is a deficient number, since it is larger than the sum of its proper divisors (1194292641).

123012131311 is a wasteful number, since it uses less digits than its factorization.

123012131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194292640.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 123012131311 its reverse (113131210321), we get a palindrome (236143341632).

The spelling of 123012131311 in words is "one hundred twenty-three billion, twelve million, one hundred thirty-one thousand, three hundred eleven".