1222402213 has 4 divisors (see below), whose sum is σ = 1222578540. Its totient is φ = 1222225888.

The previous prime is 1222402211. The next prime is 1222402271. The reversal of 1222402213 is 3122042221.

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 764356609 + 458045604 = 27647^2 + 21402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222402213 - 2¹ = 1222402211 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 (1222402211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77320 + ... + 91777.

It is an arithmetic number, because the mean of its divisors is an integer number (305644635).

Almost surely, 2^1222402213 is an apocalyptic number.

It is an amenable number.

1222402213 is a deficient number, since it is larger than the sum of its proper divisors (176327).

1222402213 is an equidigital number, since it uses as much as digits as its factorization.

1222402213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176326.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1222402213 is about 34962.8690613342. The cubic root of 1222402213 is about 1069.2305916587.

Adding to 1222402213 its reverse (3122042221), we get a palindrome (4344444434).

The spelling of 1222402213 in words is "one billion, two hundred twenty-two million, four hundred two thousand, two hundred thirteen".