111121213023 has 24 divisors (see below), whose sum is σ = 161925841376. Its totient is φ = 73428768000.

The previous prime is 111121213013. The next prime is 111121213061. The reversal of 111121213023 is 320312121111.

It is not a de Polignac number, because 111121213023 - 2⁵ = 111121212991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121212987 and 111121213005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121213013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531603 + ... + 710523.

Almost surely, 2^111121213023 is an apocalyptic number.

111121213023 is a deficient number, since it is larger than the sum of its proper divisors (50804628353).

111121213023 is a wasteful number, since it uses less digits than its factorization.

111121213023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179535 (or 179532 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111121213023 its reverse (320312121111), we get a palindrome (431433334134).

The spelling of 111121213023 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, twenty-three".