111148921 has 8 divisors (see below), whose sum is σ = 119820680. Its totient is φ = 102494592.

The previous prime is 111148901. The next prime is 111148927. The reversal of 111148921 is 129841111.

It can be written as a sum of positive squares in 4 ways, for example, as 11148921 + 100000000 = 3339^2 + 10000^2 .

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 111148921 - 2⁵ = 111148889 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 111148921.

It is not an unprimeable number, because it can be changed into a prime (111148927) 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, 10891 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (14977585).

Almost surely, 2^111148921 is an apocalyptic number.

It is an amenable number.

111148921 is a deficient number, since it is larger than the sum of its proper divisors (8671759).

111148921 is a wasteful number, since it uses less digits than its factorization.

111148921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8715.

The product of its digits is 576, while the sum is 28.

The square root of 111148921 is about 10542.7188618496. The cubic root of 111148921 is about 480.8043818808.

The spelling of 111148921 in words is "one hundred eleven million, one hundred forty-eight thousand, nine hundred twenty-one".