123111301231213 has 8 divisors (see below), whose sum is σ = 123186302706200. Its totient is φ = 123036311458368.

The previous prime is 123111301231153. The next prime is 123111301231223. The reversal of 123111301231213 is 312132103111321.

It can be written as a sum of positive squares in 4 ways, for example, as 448677124 + 123110852554089 = 21182^2 + 11095533^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123111301231213 - 2²⁵ = 123111267676781 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 (123111301231223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18167983 + ... + 24006211.

It is an arithmetic number, because the mean of its divisors is an integer number (15398287838275).

Almost surely, 2^{123111301231213} is an apocalyptic number.

It is an amenable number.

123111301231213 is a deficient number, since it is larger than the sum of its proper divisors (75001474987).

123111301231213 is a wasteful number, since it uses less digits than its factorization.

123111301231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5851071.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 123111301231213 its reverse (312132103111321), we get a palindrome (435243404342534).

The spelling of 123111301231213 in words is "one hundred twenty-three trillion, one hundred eleven billion, three hundred one million, two hundred thirty-one thousand, two hundred thirteen".