111122661 has 8 divisors (see below), whose sum is σ = 159560800. Its totient is φ = 68383152.

The previous prime is 111122653. The next prime is 111122689. The reversal of 111122661 is 166221111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111122661 - 2³ = 111122653 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 (111122611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1424611 + ... + 1424688.

It is an arithmetic number, because the mean of its divisors is an integer number (19945100).

Almost surely, 2^111122661 is an apocalyptic number.

It is an amenable number.

111122661 is a deficient number, since it is larger than the sum of its proper divisors (48438139).

111122661 is a wasteful number, since it uses less digits than its factorization.

111122661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849315.

The product of its digits is 144, while the sum is 21.

The square root of 111122661 is about 10541.4733789921. The cubic root of 111122661 is about 480.7665140143.

Adding to 111122661 its reverse (166221111), we get a palindrome (277343772).

The spelling of 111122661 in words is "one hundred eleven million, one hundred twenty-two thousand, six hundred sixty-one".