111111031023 has 4 divisors (see below), whose sum is σ = 148148041368. Its totient is φ = 74074020680.

The previous prime is 111111031007. The next prime is 111111031033. The reversal of 111111031023 is 320130111111.

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 111111031023 - 2⁴ = 111111031007 is a prime.

It is a super-2 number, since 2×111111031023² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111111030993 and 111111031011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111031033) 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, 18518505168 + ... + 18518505173.

It is an arithmetic number, because the mean of its divisors is an integer number (37037010342).

Almost surely, 2^111111031023 is an apocalyptic number.

111111031023 is a deficient number, since it is larger than the sum of its proper divisors (37037010345).

111111031023 is an equidigital number, since it uses as much as digits as its factorization.

111111031023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37037010344.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 111111031023 its reverse (320130111111), we get a palindrome (431241142134).

The spelling of 111111031023 in words is "one hundred eleven billion, one hundred eleven million, thirty-one thousand, twenty-three".