111216901 has 4 divisors (see below), whose sum is σ = 111443904. Its totient is φ = 110989900.

The previous prime is 111216869. The next prime is 111216913. The reversal of 111216901 is 109612111.

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: 109612111 = 7 ⋅15658873.

It is a cyclic number.

It is not a de Polignac number, because 111216901 - 2⁵ = 111216869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111216961) 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, 112765 + ... + 113746.

It is an arithmetic number, because the mean of its divisors is an integer number (27860976).

Almost surely, 2^111216901 is an apocalyptic number.

It is an amenable number.

111216901 is a deficient number, since it is larger than the sum of its proper divisors (227003).

111216901 is an equidigital number, since it uses as much as digits as its factorization.

111216901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227002.

The product of its (nonzero) digits is 108, while the sum is 22.

The square root of 111216901 is about 10545.9423950636. The cubic root of 111216901 is about 480.9023837937.

The spelling of 111216901 in words is "one hundred eleven million, two hundred sixteen thousand, nine hundred one".