111323012021 has 4 divisors (see below), whose sum is σ = 119886320652. Its totient is φ = 102759703392.

The previous prime is 111323011999. The next prime is 111323012039. The reversal of 111323012021 is 120210323111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9877576996 + 101445435025 = 99386^2 + 318505^2 .

It is a cyclic number.

It is not a de Polignac number, because 111323012021 - 2⁶ = 111323011957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111323012621) 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, 4281654296 + ... + 4281654321.

It is an arithmetic number, because the mean of its divisors is an integer number (29971580163).

Almost surely, 2^111323012021 is an apocalyptic number.

It is an amenable number.

111323012021 is a deficient number, since it is larger than the sum of its proper divisors (8563308631).

111323012021 is an equidigital number, since it uses as much as digits as its factorization.

111323012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563308630.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 111323012021 its reverse (120210323111), we get a palindrome (231533335132).

The spelling of 111323012021 in words is "one hundred eleven billion, three hundred twenty-three million, twelve thousand, twenty-one".