111123341321 has 4 divisors (see below), whose sum is σ = 111198375444. Its totient is φ = 111048307200.

The previous prime is 111123341291. The next prime is 111123341327. The reversal of 111123341321 is 123143321111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123143321111 = 1163 ⋅105884197.

It can be written as a sum of positive squares in 2 ways, for example, as 63101440000 + 48021901321 = 251200^2 + 219139^2 .

It is a cyclic number.

It is not a de Polignac number, because 111123341321 - 2⁶ = 111123341257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111123341327) 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, 37514840 + ... + 37517801.

It is an arithmetic number, because the mean of its divisors is an integer number (27799593861).

Almost surely, 2^111123341321 is an apocalyptic number.

It is an amenable number.

111123341321 is a deficient number, since it is larger than the sum of its proper divisors (75034123).

111123341321 is an equidigital number, since it uses as much as digits as its factorization.

111123341321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75034122.

The product of its digits is 432, while the sum is 23.

Adding to 111123341321 its reverse (123143321111), we get a palindrome (234266662432).

The spelling of 111123341321 in words is "one hundred eleven billion, one hundred twenty-three million, three hundred forty-one thousand, three hundred twenty-one".