111321131023 has 4 divisors (see below), whose sum is σ = 111324081960. Its totient is φ = 111318180088.

The previous prime is 111321131003. The next prime is 111321131027. The reversal of 111321131023 is 320131123111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320131123111 = 167 ⋅1916952833.

It is a cyclic number.

It is not a de Polignac number, because 111321131023 - 2³³ = 102731196431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111321131027) 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, 1418140 + ... + 1494577.

It is an arithmetic number, because the mean of its divisors is an integer number (27831020490).

Almost surely, 2^111321131023 is an apocalyptic number.

111321131023 is a deficient number, since it is larger than the sum of its proper divisors (2950937).

111321131023 is an equidigital number, since it uses as much as digits as its factorization.

111321131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950936.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 111321131023 its reverse (320131123111), we get a palindrome (431452254134).

The spelling of 111321131023 in words is "one hundred eleven billion, three hundred twenty-one million, one hundred thirty-one thousand, twenty-three".