123100200 has 72 divisors (see below), whose sum is σ = 413417550. Its totient is φ = 32826240.

The previous prime is 123100171. The next prime is 123100223. The reversal of 123100200 is 2001321.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 107371044 + 15729156 = 10362^2 + 3966^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32395 + ... + 35994.

Almost surely, 2^123100200 is an apocalyptic number.

123100200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100200 is an abundant number, since it is smaller than the sum of its proper divisors (290317350).

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

123100200 is a wasteful number, since it uses less digits than its factorization.

123100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68411 (or 68399 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 123100200 is about 11095.0529516537. The cubic root of 123100200 is about 497.4539910147.

Adding to 123100200 its reverse (2001321), we get a palindrome (125101521).

The spelling of 123100200 in words is "one hundred twenty-three million, one hundred thousand, two hundred".