111481021 has 8 divisors (see below), whose sum is σ = 112475520. Its totient is φ = 110491008.

The previous prime is 111480989. The next prime is 111481043. The reversal of 111481021 is 120184111.

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 111481021 - 2⁵ = 111480989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111481021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111481061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64845 + ... + 66541.

It is an arithmetic number, because the mean of its divisors is an integer number (14059440).

Almost surely, 2^111481021 is an apocalyptic number.

It is an amenable number.

111481021 is a deficient number, since it is larger than the sum of its proper divisors (994499).

111481021 is a wasteful number, since it uses less digits than its factorization.

111481021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 111481021 is about 10558.4573210294. The cubic root of 111481021 is about 481.2827681966.

The spelling of 111481021 in words is "one hundred eleven million, four hundred eighty-one thousand, twenty-one".