123531543011204 has 12 divisors (see below), whose sum is σ = 217077213550428. Its totient is φ = 61509481996800.

The previous prime is 123531543011141. The next prime is 123531543011257. The reversal of 123531543011204 is 402110345135321.

It can be written as a sum of positive squares in 2 ways, for example, as 67617071161600 + 55914471849604 = 8222960^2 + 7477598^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64072376117 + ... + 64072378044.

It is an arithmetic number, because the mean of its divisors is an integer number (18089767795869).

Almost surely, 2^{123531543011204} is an apocalyptic number.

It is an amenable number.

123531543011204 is a deficient number, since it is larger than the sum of its proper divisors (93545670539224).

123531543011204 is a wasteful number, since it uses less digits than its factorization.

123531543011204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128144754406 (or 128144754404 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 123531543011204 its reverse (402110345135321), we get a palindrome (525641888146525).

The spelling of 123531543011204 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, five hundred forty-three million, eleven thousand, two hundred four".