111388401 has 12 divisors (see below), whose sum is σ = 163622160. Its totient is φ = 72999960.

The previous prime is 111388399. The next prime is 111388427. The reversal of 111388401 is 104883111.

It is not a de Polignac number, because 111388401 - 2¹ = 111388399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111388441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104355 + ... + 105416.

It is an arithmetic number, because the mean of its divisors is an integer number (13635180).

Almost surely, 2^111388401 is an apocalyptic number.

It is an amenable number.

111388401 is a deficient number, since it is larger than the sum of its proper divisors (52233759).

111388401 is a wasteful number, since it uses less digits than its factorization.

111388401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209836 (or 209833 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 111388401 is about 10554.0703522385. The cubic root of 111388401 is about 481.1494457704.

The spelling of 111388401 in words is "one hundred eleven million, three hundred eighty-eight thousand, four hundred one".