111666222441 has 24 divisors (see below), whose sum is σ = 165290920704. Its totient is φ = 72601525440.

The previous prime is 111666222413. The next prime is 111666222469. The reversal of 111666222441 is 144222666111.

It is an interprime number because it is at equal distance from previous prime (111666222413) and next prime (111666222469).

It is not a de Polignac number, because 111666222441 - 2²⁵ = 111632668009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111666222396 and 111666222405.

It is not an unprimeable number, because it can be changed into a prime (111666222401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 966340 + ... + 1075706.

It is an arithmetic number, because the mean of its divisors is an integer number (6887121696).

Almost surely, 2^111666222441 is an apocalyptic number.

It is an amenable number.

111666222441 is a deficient number, since it is larger than the sum of its proper divisors (53624698263).

111666222441 is a wasteful number, since it uses less digits than its factorization.

111666222441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112181 (or 112178 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

Adding to 111666222441 its reverse (144222666111), we get a palindrome (255888888552).

The spelling of 111666222441 in words is "one hundred eleven billion, six hundred sixty-six million, two hundred twenty-two thousand, four hundred forty-one".