111447121 has 8 divisors (see below), whose sum is σ = 123133824. Its totient is φ = 100330560.

The previous prime is 111447109. The next prime is 111447131. The reversal of 111447121 is 121744111.

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

It is a cyclic number.

It is not a de Polignac number, because 111447121 - 2¹⁵ = 111414353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111447092 and 111447101.

It is not an unprimeable number, because it can be changed into a prime (111447131) 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 7 ways as a sum of consecutive naturals, for example, 142125 + ... + 142906.

It is an arithmetic number, because the mean of its divisors is an integer number (15391728).

Almost surely, 2^111447121 is an apocalyptic number.

It is an amenable number.

111447121 is a deficient number, since it is larger than the sum of its proper divisors (11686703).

111447121 is a wasteful number, since it uses less digits than its factorization.

111447121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285071.

The product of its digits is 224, while the sum is 22.

The square root of 111447121 is about 10556.8518508123. The cubic root of 111447121 is about 481.2339792047.

The spelling of 111447121 in words is "one hundred eleven million, four hundred forty-seven thousand, one hundred twenty-one".