200100123 has 12 divisors (see below), whose sum is σ = 293348328. Its totient is φ = 131408640.

The previous prime is 200100083. The next prime is 200100137. The reversal of 200100123 is 321001002.

It is a happy number.

It is not a de Polignac number, because 200100123 - 2⁶ = 200100059 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (200100163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165318 + ... + 166523.

It is an arithmetic number, because the mean of its divisors is an integer number (24445694).

Almost surely, 2^200100123 is an apocalyptic number.

200100123 is a deficient number, since it is larger than the sum of its proper divisors (93248205).

200100123 is a wasteful number, since it uses less digits than its factorization.

200100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331914 (or 331911 counting only the distinct ones).

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

The square root of 200100123 is about 14145.6750634249. The cubic root of 200100123 is about 584.9011185052.

Adding to 200100123 its reverse (321001002), we get a palindrome (521101125).

The spelling of 200100123 in words is "two hundred million, one hundred thousand, one hundred twenty-three".