111121213 has 8 divisors (see below), whose sum is σ = 127173440. Its totient is φ = 95113440.

The previous prime is 111121201. The next prime is 111121229. The reversal of 111121213 is 312121111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111121213 - 2¹⁷ = 110990141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121193 and 111121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5568 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (15896680).

Almost surely, 2^111121213 is an apocalyptic number.

It is an amenable number.

111121213 is a deficient number, since it is larger than the sum of its proper divisors (16052227).

111121213 is an equidigital number, since it uses as much as digits as its factorization.

111121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22227.

The product of its digits is 12, while the sum is 13.

The square root of 111121213 is about 10541.4046976672. The cubic root of 111121213 is about 480.7644257725.

Adding to 111121213 its reverse (312121111), we get a palindrome (423242324).

The spelling of 111121213 in words is "one hundred eleven million, one hundred twenty-one thousand, two hundred thirteen".