123113010130020 has 144 divisors (see below), whose sum is σ = 386326145565360. Its totient is φ = 31697569225728.

The previous prime is 123113010130013. The next prime is 123113010130039. The reversal of 123113010130020 is 20031010311321.

123113010130020 is a `hidden beast` number, since 1 + 2 + 311 + 30 + 1 + 0 + 1 + 300 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 11732173151076 + 111380836978944 = 3425226^2 + 10553712^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123113010129975 and 123113010130002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 433603542 + ... + 433887378.

It is an arithmetic number, because the mean of its divisors is an integer number (2682820455315).

Almost surely, 2^{123113010130020} is an apocalyptic number.

123113010130020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123113010130020 is an abundant number, since it is smaller than the sum of its proper divisors (263213135435340).

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

123113010130020 is a wasteful number, since it uses less digits than its factorization.

123113010130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366974 (or 366969 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123113010130020 its reverse (20031010311321), we get a palindrome (143144020441341).

The spelling of 123113010130020 in words is "one hundred twenty-three trillion, one hundred thirteen billion, ten million, one hundred thirty thousand, twenty".