123111115504 has 20 divisors (see below), whose sum is σ = 256876077976. Its totient is φ = 56820514752.

The previous prime is 123111115493. The next prime is 123111115507. The reversal of 123111115504 is 405511111321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123111115507) 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, 295939974 + ... + 295940389.

Almost surely, 2^123111115504 is an apocalyptic number.

It is an amenable number.

123111115504 is an abundant number, since it is smaller than the sum of its proper divisors (133764962472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123111115504 is a wasteful number, since it uses less digits than its factorization.

123111115504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591880384 (or 591880378 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 123111115504 its reverse (405511111321), we get a palindrome (528622226825).

The spelling of 123111115504 in words is "one hundred twenty-three billion, one hundred eleven million, one hundred fifteen thousand, five hundred four".