100001123 has 16 divisors (see below), whose sum is σ = 112896000. Its totient is φ = 88013952.

The previous prime is 100001119. The next prime is 100001131. The reversal of 100001123 is 321100001.

It is a cyclic number.

It is not a de Polignac number, because 100001123 - 2² = 100001119 is a prime.

It is a super-2 number, since 2×100001123² = 20000449202522258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100001123.

It is not an unprimeable number, because it can be changed into a prime (100001183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23558 + ... + 27476.

It is an arithmetic number, because the mean of its divisors is an integer number (7056000).

Almost surely, 2^100001123 is an apocalyptic number.

100001123 is a deficient number, since it is larger than the sum of its proper divisors (12894877).

100001123 is a wasteful number, since it uses less digits than its factorization.

100001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 100001123 is about 10000.0561498424. The cubic root of 100001123 is about 464.1606208562.

Adding to 100001123 its reverse (321100001), we get a palindrome (421101124).

The spelling of 100001123 in words is "one hundred million, one thousand, one hundred twenty-three".