111441421 has 16 divisors (see below), whose sum is σ = 138096000. Its totient is φ = 87571008.

The previous prime is 111441401. The next prime is 111441427. The reversal of 111441421 is 124144111.

It is not a de Polignac number, because 111441421 - 2⁷ = 111441293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111441427) 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 15 ways as a sum of consecutive naturals, for example, 9450 + ... + 17668.

It is an arithmetic number, because the mean of its divisors is an integer number (8631000).

Almost surely, 2^111441421 is an apocalyptic number.

It is an amenable number.

111441421 is a deficient number, since it is larger than the sum of its proper divisors (26654579).

111441421 is a wasteful number, since it uses less digits than its factorization.

111441421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8388.

The product of its digits is 128, while the sum is 19.

The square root of 111441421 is about 10556.5818805142. The cubic root of 111441421 is about 481.2257747743.

Adding to 111441421 its reverse (124144111), we get a palindrome (235585532).

The spelling of 111441421 in words is "one hundred eleven million, four hundred forty-one thousand, four hundred twenty-one".