201100023 has 8 divisors (see below), whose sum is σ = 297926000. Its totient is φ = 134066664.

The previous prime is 201100013. The next prime is 201100027. The reversal of 201100023 is 320001102.

It is a happy number.

It is not a de Polignac number, because 201100023 - 2¹⁰ = 201098999 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201099978 and 201100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100027) 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 7 ways as a sum of consecutive naturals, for example, 3724048 + ... + 3724101.

It is an arithmetic number, because the mean of its divisors is an integer number (37240750).

Almost surely, 2^201100023 is an apocalyptic number.

201100023 is a deficient number, since it is larger than the sum of its proper divisors (96825977).

201100023 is an equidigital number, since it uses as much as digits as its factorization.

201100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448158 (or 7448152 counting only the distinct ones).

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

The square root of 201100023 is about 14180.9739792442. The cubic root of 201100023 is about 585.8737502099.

Adding to 201100023 its reverse (320001102), we get a palindrome (521101125).

The spelling of 201100023 in words is "two hundred one million, one hundred thousand, twenty-three".