111311021023 has 4 divisors (see below), whose sum is σ = 117858728160. Its totient is φ = 104763313888.

The previous prime is 111311021021. The next prime is 111311021051. The reversal of 111311021023 is 320120113111.

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: 320120113111 = 59 ⋅5425764629.

It is a cyclic number.

It is not a de Polignac number, because 111311021023 - 2¹ = 111311021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111311020988 and 111311021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311021021) 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, 3273853543 + ... + 3273853576.

It is an arithmetic number, because the mean of its divisors is an integer number (29464682040).

Almost surely, 2^111311021023 is an apocalyptic number.

111311021023 is a deficient number, since it is larger than the sum of its proper divisors (6547707137).

111311021023 is an equidigital number, since it uses as much as digits as its factorization.

111311021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547707136.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111311021023 its reverse (320120113111), we get a palindrome (431431134134).

The spelling of 111311021023 in words is "one hundred eleven billion, three hundred eleven million, twenty-one thousand, twenty-three".