111921411 has 32 divisors (see below), whose sum is σ = 181232640. Its totient is φ = 60068736.

The previous prime is 111921391. The next prime is 111921437. The reversal of 111921411 is 114129111.

It is not a de Polignac number, because 111921411 - 2⁵ = 111921379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (111921451) 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 31 ways as a sum of consecutive naturals, for example, 20050 + ... + 25016.

It is an arithmetic number, because the mean of its divisors is an integer number (5663520).

Almost surely, 2^111921411 is an apocalyptic number.

111921411 is a deficient number, since it is larger than the sum of its proper divisors (69311229).

111921411 is a wasteful number, since it uses less digits than its factorization.

111921411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043.

The product of its digits is 72, while the sum is 21.

The square root of 111921411 is about 10579.2916114454. The cubic root of 111921411 is about 481.9156820076.

The spelling of 111921411 in words is "one hundred eleven million, nine hundred twenty-one thousand, four hundred eleven".