7113221 has 2 divisors, whose sum is σ = 7113222. Its totient is φ = 7113220.

The previous prime is 7113209. The next prime is 7113299. The reversal of 7113221 is 1223117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 2656900 = 2111^2 + 1630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7113221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7113221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7113721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3556610 + 3556611.

It is an arithmetic number, because the mean of its divisors is an integer number (3556611).

Almost surely, 2^7113221 is an apocalyptic number.

It is an amenable number.

7113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7113221 is an equidigital number, since it uses as much as digits as its factorization.

7113221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 17.

The square root of 7113221 is about 2667.0622414934. The cubic root of 7113221 is about 192.3189594916.

Adding to 7113221 its reverse (1223117), we get a palindrome (8336338).

The spelling of 7113221 in words is "seven million, one hundred thirteen thousand, two hundred twenty-one".