111112100123 has 4 divisors (see below), whose sum is σ = 111368710488. Its totient is φ = 110855489760.

The previous prime is 111112100101. The next prime is 111112100159. The reversal of 111112100123 is 321001211111.

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

It is a cyclic number.

It is not a de Polignac number, because 111112100123 - 2¹⁰ = 111112099099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112100098 and 111112100107.

It is not an unprimeable number, because it can be changed into a prime (111112108123) 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, 128304533 + ... + 128305398.

It is an arithmetic number, because the mean of its divisors is an integer number (27842177622).

Almost surely, 2^111112100123 is an apocalyptic number.

111112100123 is a deficient number, since it is larger than the sum of its proper divisors (256610365).

111112100123 is an equidigital number, since it uses as much as digits as its factorization.

111112100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256610364.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 111112100123 its reverse (321001211111), we get a palindrome (432113311234).

The spelling of 111112100123 in words is "one hundred eleven billion, one hundred twelve million, one hundred thousand, one hundred twenty-three".