200111110123 has 4 divisors (see below), whose sum is σ = 200369986848. Its totient is φ = 199852233400.

The previous prime is 200111110109. The next prime is 200111110181. The reversal of 200111110123 is 321011111002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200111110123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200111110223) 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, 129437203 + ... + 129438748.

It is an arithmetic number, because the mean of its divisors is an integer number (50092496712).

Almost surely, 2^200111110123 is an apocalyptic number.

200111110123 is a deficient number, since it is larger than the sum of its proper divisors (258876725).

200111110123 is an equidigital number, since it uses as much as digits as its factorization.

200111110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258876724.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 200111110123 its reverse (321011111002), we get a palindrome (521122221125).

The spelling of 200111110123 in words is "two hundred billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-three".