1111213 has 2 divisors, whose sum is σ = 1111214.
Its totient is φ = 1111212.
The previous prime is 1111211. The next prime is 1111219. The reversal of 1111213 is 3121111.
It is a m-pointer prime, because the next prime (1111219) can be obtained adding 1111213 to its product of digits (6).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 915849 + 195364 = 957^2 + 442^2
It is a cyclic number.
It is not a de Polignac number, because 1111213 - 21 = 1111211 is a prime.
Together with 1111211, it forms a pair of twin primes.
It is an Ulam number.
It is a self number, because there is not a number n which added to its sum of digits gives 1111213.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1111211) 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 as a sum of consecutive naturals, namely, 555606 + 555607.
It is an arithmetic number, because the mean of its divisors is an integer number (555607).
21111213 is an apocalyptic number.
It is an amenable number.
1111213 is a deficient number, since it is larger than the sum of its proper divisors (1).
1111213 is an equidigital number, since it uses as much as digits as its factorization.
1111213 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 6, while the sum is 10.
The square root of 1111213 is about 1054.1408824251.
The cubic root of 1111213 is about 103.5775826930.
Adding to 1111213 its reverse (3121111), we get a palindrome (4232324).
The spelling of 1111213 in words is "one million, one hundred eleven thousand, two hundred thirteen".