123421834251100 has 162 divisors, whose sum is σ = 342449691009720. Its totient is φ = 38469142958400.

The previous prime is 123421834251097. The next prime is 123421834251169. The reversal of 123421834251100 is 1152438124321.

It is a self number, because there is not a number n which added to its sum of digits gives 123421834251100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 103490280 + ... + 104676079.

Almost surely, 2^{123421834251100} is an apocalyptic number.

123421834251100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123421834251100 is an abundant number, since it is smaller than the sum of its proper divisors (219027856758620).

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

123421834251100 is a wasteful number, since it uses less digits than its factorization.

123421834251100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208166409 (or 208166384 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 123421834251100 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, eight hundred thirty-four million, two hundred fifty-one thousand, one hundred".