123030251100020 has 192 divisors, whose sum is σ = 295043300665344. Its totient is φ = 42688512000000.

The previous prime is 123030251100013. The next prime is 123030251100037. The reversal of 123030251100020 is 20001152030321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123030251099965 and 123030251100001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 165635060 + ... + 166376180.

It is an arithmetic number, because the mean of its divisors is an integer number (1536683857632).

Almost surely, 2^{123030251100020} is an apocalyptic number.

123030251100020 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 123030251100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147521650332672).

123030251100020 is an abundant number, since it is smaller than the sum of its proper divisors (172013049565324).

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

123030251100020 is a wasteful number, since it uses less digits than its factorization.

123030251100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741514 (or 741512 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 123030251100020 in words is "one hundred twenty-three trillion, thirty billion, two hundred fifty-one million, one hundred thousand, twenty".