111188401 has 2 divisors, whose sum is σ = 111188402. Its totient is φ = 111188400.

The previous prime is 111188387. The next prime is 111188489. The reversal of 111188401 is 104881111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97535376 + 13653025 = 9876^2 + 3695^2 .

It is a cyclic number.

It is not a de Polignac number, because 111188401 - 2⁵ = 111188369 is a prime.

It is not a weakly prime, because it can be changed into another prime (111188491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55594200 + 55594201.

It is an arithmetic number, because the mean of its divisors is an integer number (55594201).

Almost surely, 2^111188401 is an apocalyptic number.

It is an amenable number.

111188401 is a deficient number, since it is larger than the sum of its proper divisors (1).

111188401 is an equidigital number, since it uses as much as digits as its factorization.

111188401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 25.

The square root of 111188401 is about 10544.5910778939. The cubic root of 111188401 is about 480.8613022413.

The spelling of 111188401 in words is "one hundred eleven million, one hundred eighty-eight thousand, four hundred one".