111001210123 has 4 divisors (see below), whose sum is σ = 111799780120. Its totient is φ = 110202640128.

The previous prime is 111001210081. The next prime is 111001210129. The reversal of 111001210123 is 321012100111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321012100111 = 43 ⋅7465397677.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111001210123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111001210129) 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, 399284790 + ... + 399285067.

It is an arithmetic number, because the mean of its divisors is an integer number (27949945030).

Almost surely, 2^111001210123 is an apocalyptic number.

111001210123 is a deficient number, since it is larger than the sum of its proper divisors (798569997).

111001210123 is an equidigital number, since it uses as much as digits as its factorization.

111001210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798569996.

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

Adding to 111001210123 its reverse (321012100111), we get a palindrome (432013310234).

The spelling of 111001210123 in words is "one hundred eleven billion, one million, two hundred ten thousand, one hundred twenty-three".