123100223131240 has 64 divisors (see below), whose sum is σ = 277374647140560. Its totient is φ = 49169156874240.

The previous prime is 123100223131229. The next prime is 123100223131241. The reversal of 123100223131240 is 42131322001321.

It can be written as a sum of positive squares in 8 ways, for example, as 36818900708164 + 86281322423076 = 6067858^2 + 9288774^2 .

It is a super-2 number, since 2×123100223131240² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123100223131241) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 147791622 + ... + 148622218.

Almost surely, 2^{123100223131240} is an apocalyptic number.

123100223131240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100223131240 is an abundant number, since it is smaller than the sum of its proper divisors (154274424009320).

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

123100223131240 is a wasteful number, since it uses less digits than its factorization.

123100223131240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835942 (or 835938 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 123100223131240 its reverse (42131322001321), we get a palindrome (165231545132561).

The spelling of 123100223131240 in words is "one hundred twenty-three trillion, one hundred billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred forty".