123200121100 has 72 divisors (see below), whose sum is σ = 321617192960. Its totient is φ = 40016877120.

The previous prime is 123200121091. The next prime is 123200121127. The reversal of 123200121100 is 1121002321.

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, 4618284 + ... + 4644883.

Almost surely, 2^123200121100 is an apocalyptic number.

123200121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123200121100 is an abundant number, since it is smaller than the sum of its proper divisors (198417071860).

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

123200121100 is a wasteful number, since it uses less digits than its factorization.

123200121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9263207 (or 9263200 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 123200121100 its reverse (1121002321), we get a palindrome (124321123421).

The spelling of 123200121100 in words is "one hundred twenty-three billion, two hundred million, one hundred twenty-one thousand, one hundred".