123000012100 has 36 divisors (see below), whose sum is σ = 305040031744. Its totient is φ = 42171432480.

The previous prime is 123000012089. The next prime is 123000012151. The reversal of 123000012100 is 1210000321.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87856452 + ... + 87857851.

Almost surely, 2^123000012100 is an apocalyptic number.

123000012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123000012100 is an abundant number, since it is smaller than the sum of its proper divisors (182040019644).

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

123000012100 is a wasteful number, since it uses less digits than its factorization.

123000012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175714324 (or 175714317 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 123000012100 its reverse (1210000321), we get a palindrome (124210012421).

The spelling of 123000012100 in words is "one hundred twenty-three billion, twelve thousand, one hundred".