111971223 has 36 divisors (see below), whose sum is σ = 202624968. Its totient is φ = 59058720.

The previous prime is 111971221. The next prime is 111971227. The reversal of 111971223 is 322179111.

It is not a de Polignac number, because 111971223 - 2¹ = 111971221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111971221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4033 + ... + 15498.

Almost surely, 2^111971223 is an apocalyptic number.

111971223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111971223 is a deficient number, since it is larger than the sum of its proper divisors (90653745).

111971223 is a wasteful number, since it uses less digits than its factorization.

111971223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19564 (or 19554 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 111971223 is about 10581.6455714600. The cubic root of 111971223 is about 481.9871655702.

The spelling of 111971223 in words is "one hundred eleven million, nine hundred seventy-one thousand, two hundred twenty-three".