111120001 has 4 divisors (see below), whose sum is σ = 111153600. Its totient is φ = 111086404.

The previous prime is 111119977. The next prime is 111120013. The reversal of 111120001 is 100021111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100021111 = 19 ⋅5264269.

It is a cyclic number.

It is not a de Polignac number, because 111120001 - 2¹⁷ = 110988929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111120071) 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, 11221 + ... + 18658.

It is an arithmetic number, because the mean of its divisors is an integer number (27788400).

Almost surely, 2^111120001 is an apocalyptic number.

It is an amenable number.

111120001 is a deficient number, since it is larger than the sum of its proper divisors (33599).

111120001 is an equidigital number, since it uses as much as digits as its factorization.

111120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33598.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 111120001 is about 10541.3472099158. The cubic root of 111120001 is about 480.7626778656.

Adding to 111120001 its reverse (100021111), we get a palindrome (211141112).

It can be divided in two parts, 1111 and 20001, that multiplied together give a triangular number (22221111 = T₆₆₆₆).

The spelling of 111120001 in words is "one hundred eleven million, one hundred twenty thousand, one".