123023120100 has 72 divisors (see below), whose sum is σ = 356304778368. Its totient is φ = 32773180800.

The previous prime is 123023120069. The next prime is 123023120113. The reversal of 123023120100 is 1021320321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123023120100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93445 + ... + 504755.

Almost surely, 2^123023120100 is an apocalyptic number.

123023120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123023120100 is an abundant number, since it is smaller than the sum of its proper divisors (233281658268).

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

123023120100 is a wasteful number, since it uses less digits than its factorization.

123023120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412325 (or 412318 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 123023120100 its reverse (1021320321), we get a palindrome (124044440421).

The spelling of 123023120100 in words is "one hundred twenty-three billion, twenty-three million, one hundred twenty thousand, one hundred".