123243431303511 has 24 divisors (see below), whose sum is σ = 178346357872800. Its totient is φ = 82010930512896.

The previous prime is 123243431303477. The next prime is 123243431303519. The reversal of 123243431303511 is 115303134342321.

123243431303511 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 4 + 3 + 4 + 3 + 130 + 3 + 511 = 666.

It is not a de Polignac number, because 123243431303511 - 2¹⁷ = 123243431172439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243431303519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22601790 + ... + 27519588.

It is an arithmetic number, because the mean of its divisors is an integer number (7431098244700).

Almost surely, 2^{123243431303511} is an apocalyptic number.

123243431303511 is a deficient number, since it is larger than the sum of its proper divisors (55102926569289).

123243431303511 is a wasteful number, since it uses less digits than its factorization.

123243431303511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922935 (or 4922932 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 123243431303511 its reverse (115303134342321), we get a palindrome (238546565645832).

The spelling of 123243431303511 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-one million, three hundred three thousand, five hundred eleven".