123312440130 has 64 divisors (see below), whose sum is σ = 322933671936. Its totient is φ = 29886584000.

The previous prime is 123312440129. The next prime is 123312440137. The reversal of 123312440130 is 31044213321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123312440130.

It is not an unprimeable number, because it can be changed into a prime (123312440137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1365685 + ... + 1453175.

It is an arithmetic number, because the mean of its divisors is an integer number (5045838624).

Almost surely, 2^123312440130 is an apocalyptic number.

123312440130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123312440130 is an abundant number, since it is smaller than the sum of its proper divisors (199621231806).

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

123312440130 is a wasteful number, since it uses less digits than its factorization.

123312440130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91783.

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

Adding to 123312440130 its reverse (31044213321), we get a palindrome (154356653451).

The spelling of 123312440130 in words is "one hundred twenty-three billion, three hundred twelve million, four hundred forty thousand, one hundred thirty".