111221156 has 12 divisors (see below), whose sum is σ = 194904192. Its totient is φ = 55534248.

The previous prime is 111221153. The next prime is 111221167. The reversal of 111221156 is 651122111.

It is a pancake number, because a pancake can be divided into 111221156 parts by 14914 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (111221153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15740 + ... + 21683.

It is an arithmetic number, because the mean of its divisors is an integer number (16242016).

Almost surely, 2^111221156 is an apocalyptic number.

It is an amenable number.

111221156 is a deficient number, since it is larger than the sum of its proper divisors (83683036).

111221156 is a wasteful number, since it uses less digits than its factorization.

111221156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38170 (or 38168 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 111221156 is about 10546.1441294911. The cubic root of 111221156 is about 480.9085165953.

Adding to 111221156 its reverse (651122111), we get a palindrome (762343267).

The spelling of 111221156 in words is "one hundred eleven million, two hundred twenty-one thousand, one hundred fifty-six".