123102111020240 has 80 divisors (see below), whose sum is σ = 312331831269120. Its totient is φ = 44750050844160.

The previous prime is 123102111020237. The next prime is 123102111020243. The reversal of 123102111020240 is 42020111201321.

It is an interprime number because it is at equal distance from previous prime (123102111020237) and next prime (123102111020243).

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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123102111020243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19680539 + ... + 25169978.

It is an arithmetic number, because the mean of its divisors is an integer number (3904147890864).

Almost surely, 2^{123102111020240} is an apocalyptic number.

123102111020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123102111020240 is an abundant number, since it is smaller than the sum of its proper divisors (189229720248880).

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

123102111020240 is a wasteful number, since it uses less digits than its factorization.

123102111020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44853660 (or 44853654 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 123102111020240 its reverse (42020111201321), we get a palindrome (165122222221561).

The spelling of 123102111020240 in words is "one hundred twenty-three trillion, one hundred two billion, one hundred eleven million, twenty thousand, two hundred forty".