111216013 has 4 divisors (see below), whose sum is σ = 111238848. Its totient is φ = 111193180.

The previous prime is 111215999. The next prime is 111216019. The reversal of 111216013 is 310612111.

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 111216013 - 2⁵ = 111215981 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 (111216019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853 + ... + 14938.

It is an arithmetic number, because the mean of its divisors is an integer number (27809712).

Almost surely, 2^111216013 is an apocalyptic number.

It is an amenable number.

111216013 is a deficient number, since it is larger than the sum of its proper divisors (22835).

111216013 is an equidigital number, since it uses as much as digits as its factorization.

111216013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22834.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 111216013 is about 10545.9002934790. The cubic root of 111216013 is about 480.9011038850.

Adding to 111216013 its reverse (310612111), we get a palindrome (421828124).

The spelling of 111216013 in words is "one hundred eleven million, two hundred sixteen thousand, thirteen".