1222223213 has 4 divisors (see below), whose sum is σ = 1233436380. Its totient is φ = 1211010048.

The previous prime is 1222223209. The next prime is 1222223221. The reversal of 1222223213 is 3123222221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 345885604 + 876337609 = 18598^2 + 29603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222223213 - 2² = 1222223209 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 (1222223113) 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, 5606420 + ... + 5606637.

It is an arithmetic number, because the mean of its divisors is an integer number (308359095).

Almost surely, 2^1222223213 is an apocalyptic number.

It is an amenable number.

1222223213 is a deficient number, since it is larger than the sum of its proper divisors (11213167).

1222223213 is a wasteful number, since it uses less digits than its factorization.

1222223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11213166.

The product of its digits is 576, while the sum is 20.

The square root of 1222223213 is about 34960.3091090454. The cubic root of 1222223213 is about 1069.1783989034.

Adding to 1222223213 its reverse (3123222221), we get a palindrome (4345445434).

The spelling of 1222223213 in words is "one billion, two hundred twenty-two million, two hundred twenty-three thousand, two hundred thirteen".