111501001 has 4 divisors (see below), whose sum is σ = 111558672. Its totient is φ = 111443332.

The previous prime is 111500989. The next prime is 111501007. The reversal of 111501001 is 100105111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111501001 - 2⁹ = 111500489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111501007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25831 + ... + 29836.

It is an arithmetic number, because the mean of its divisors is an integer number (27889668).

Almost surely, 2^111501001 is an apocalyptic number.

It is an amenable number.

111501001 is a deficient number, since it is larger than the sum of its proper divisors (57671).

111501001 is an equidigital number, since it uses as much as digits as its factorization.

111501001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57670.

The product of its (nonzero) digits is 5, while the sum is 10.

The square root of 111501001 is about 10559.4034395888. The cubic root of 111501001 is about 481.3115188461.

Adding to 111501001 its reverse (100105111), we get a palindrome (211606112).

The spelling of 111501001 in words is "one hundred eleven million, five hundred one thousand, one".