111121010023 has 4 divisors (see below), whose sum is σ = 113485286880. Its totient is φ = 108756733168.

The previous prime is 111121009931. The next prime is 111121010027. The reversal of 111121010023 is 320010121111.

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: 320010121111 = 1231 ⋅259959481.

It is a cyclic number.

It is not a de Polignac number, because 111121010023 - 2²¹ = 111118912871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121009985 and 111121010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121010027) 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, 1182138358 + ... + 1182138451.

It is an arithmetic number, because the mean of its divisors is an integer number (28371321720).

Almost surely, 2^111121010023 is an apocalyptic number.

111121010023 is a deficient number, since it is larger than the sum of its proper divisors (2364276857).

111121010023 is an equidigital number, since it uses as much as digits as its factorization.

111121010023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364276856.

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

Adding to 111121010023 its reverse (320010121111), we get a palindrome (431131131134).

The spelling of 111121010023 in words is "one hundred eleven billion, one hundred twenty-one million, ten thousand, twenty-three".