1222212213 has 16 divisors (see below), whose sum is σ = 1814883840. Its totient is φ = 812918592.

The previous prime is 1222212197. The next prime is 1222212217. The reversal of 1222212213 is 3122122221.

It is not a de Polignac number, because 1222212213 - 2⁴ = 1222212197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222212217) 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 15 ways as a sum of consecutive naturals, for example, 40581 + ... + 63962.

It is an arithmetic number, because the mean of its divisors is an integer number (113430240).

Almost surely, 2^1222212213 is an apocalyptic number.

It is an amenable number.

1222212213 is a deficient number, since it is larger than the sum of its proper divisors (592671627).

1222212213 is a wasteful number, since it uses less digits than its factorization.

1222212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104985 (or 104979 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1222212213 is about 34960.1517874279. The cubic root of 1222212213 is about 1069.1751913612.

Adding to 1222212213 its reverse (3122122221), we get a palindrome (4344334434).

The spelling of 1222212213 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred thirteen".