100200123 has 6 divisors (see below), whose sum is σ = 144733524. Its totient is φ = 66800076.

The previous prime is 100200119. The next prime is 100200161. The reversal of 100200123 is 321002001.

It is a happy number.

It is not a de Polignac number, because 100200123 - 2² = 100200119 is a prime.

It is a super-3 number, since 3×100200123³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11133347 = 100200123 / (1 + 0 + 0 + 2 + 0 + 0 + 1 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (100200223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5566665 + ... + 5566682.

It is an arithmetic number, because the mean of its divisors is an integer number (24122254).

Almost surely, 2^100200123 is an apocalyptic number.

100200123 is a deficient number, since it is larger than the sum of its proper divisors (44533401).

100200123 is a wasteful number, since it uses less digits than its factorization.

100200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11133353 (or 11133350 counting only the distinct ones).

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

The square root of 100200123 is about 10010.0011488511. The cubic root of 100200123 is about 464.4683066047.

Adding to 100200123 its reverse (321002001), we get a palindrome (421202124).

The spelling of 100200123 in words is "one hundred million, two hundred thousand, one hundred twenty-three".