123040431213 has 16 divisors (see below), whose sum is σ = 187500311040. Its totient is φ = 70305019056.

The previous prime is 123040431197. The next prime is 123040431233. The reversal of 123040431213 is 312134040321.

It is a happy number.

It is not a de Polignac number, because 123040431213 - 2⁴ = 123040431197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040431233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266106 + ... + 562932.

It is an arithmetic number, because the mean of its divisors is an integer number (11718769440).

Almost surely, 2^123040431213 is an apocalyptic number.

It is an amenable number.

123040431213 is a deficient number, since it is larger than the sum of its proper divisors (64459879827).

123040431213 is a wasteful number, since it uses less digits than its factorization.

123040431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316576.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123040431213 its reverse (312134040321), we get a palindrome (435174471534).

The spelling of 123040431213 in words is "one hundred twenty-three billion, forty million, four hundred thirty-one thousand, two hundred thirteen".