123100243240240 has 80 divisors (see below), whose sum is σ = 327193193206080. Its totient is φ = 42193118822400.

The previous prime is 123100243240217. The next prime is 123100243240259. The reversal of 123100243240240 is 42042342001321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 123100243240199 and 123100243240208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31151961 + ... + 34880440.

It is an arithmetic number, because the mean of its divisors is an integer number (4089914915076).

Almost surely, 2^{123100243240240} is an apocalyptic number.

123100243240240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100243240240 is an abundant number, since it is smaller than the sum of its proper divisors (204092949965840).

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

123100243240240 is a wasteful number, since it uses less digits than its factorization.

123100243240240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66035750 (or 66035744 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 123100243240240 its reverse (42042342001321), we get a palindrome (165142585241561).

The spelling of 123100243240240 in words is "one hundred twenty-three trillion, one hundred billion, two hundred forty-three million, two hundred forty thousand, two hundred forty".