123021200423100 has 288 divisors, whose sum is σ = 419949913485312. Its totient is φ = 27209629440000.

The previous prime is 123021200423003. The next prime is 123021200423159. The reversal of 123021200423100 is 1324002120321.

It is a super-2 number, since 2×123021200423100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 95 ways as a sum of consecutive naturals, for example, 783790630 + ... + 783947570.

It is an arithmetic number, because the mean of its divisors is an integer number (1458159421824).

Almost surely, 2^{123021200423100} is an apocalyptic number.

123021200423100 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 123021200423100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209974956742656).

123021200423100 is an abundant number, since it is smaller than the sum of its proper divisors (296928713062212).

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

123021200423100 is a wasteful number, since it uses less digits than its factorization.

123021200423100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169037 (or 169030 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 123021200423100 its reverse (1324002120321), we get a palindrome (124345202543421).

The spelling of 123021200423100 in words is "one hundred twenty-three trillion, twenty-one billion, two hundred million, four hundred twenty-three thousand, one hundred".