201112100123 has 4 divisors (see below), whose sum is σ = 219395018328. Its totient is φ = 182829181920.

The previous prime is 201112100047. The next prime is 201112100141. The reversal of 201112100123 is 321001211102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 201112100123 - 2³⁶ = 132392623387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201112100098 and 201112100107.

It is not an unprimeable number, because it can be changed into a prime (201112100153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9141459086 + ... + 9141459107.

It is an arithmetic number, because the mean of its divisors is an integer number (54848754582).

Almost surely, 2^201112100123 is an apocalyptic number.

201112100123 is a deficient number, since it is larger than the sum of its proper divisors (18282918205).

201112100123 is a wasteful number, since it uses less digits than its factorization.

201112100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18282918204.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201112100123 its reverse (321001211102), we get a palindrome (522113311225).

The spelling of 201112100123 in words is "two hundred one billion, one hundred twelve million, one hundred thousand, one hundred twenty-three".