123310421403440 has 160 divisors (see below), whose sum is σ = 291507814555776. Its totient is φ = 48500229980160.

The previous prime is 123310421403361. The next prime is 123310421403473. The reversal of 123310421403440 is 44304124013321.

It is a junction number, because it is equal to n+sod(n) for n = 123310421403397 and 123310421403406.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 8885949782 + ... + 8885963658.

Almost surely, 2^{123310421403440} is an apocalyptic number.

123310421403440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123310421403440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145753907277888).

123310421403440 is an abundant number, since it is smaller than the sum of its proper divisors (168197393152336).

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

123310421403440 is a wasteful number, since it uses less digits than its factorization.

123310421403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18007 (or 18001 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 123310421403440 its reverse (44304124013321), we get a palindrome (167614545416761).

The spelling of 123310421403440 in words is "one hundred twenty-three trillion, three hundred ten billion, four hundred twenty-one million, four hundred three thousand, four hundred forty".