1221302222 has 16 divisors (see below), whose sum is σ = 2102889600. Its totient is φ = 521108088.

The previous prime is 1221302213. The next prime is 1221302227. The reversal of 1221302222 is 2222031221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221302222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221302227) 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 7 ways as a sum of consecutive naturals, for example, 188972 + ... + 195327.

It is an arithmetic number, because the mean of its divisors is an integer number (131430600).

Almost surely, 2^1221302222 is an apocalyptic number.

1221302222 is a deficient number, since it is larger than the sum of its proper divisors (881587378).

1221302222 is a wasteful number, since it uses less digits than its factorization.

1221302222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384535.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1221302222 is about 34947.1346751061. The cubic root of 1221302222 is about 1068.9097760875.

Adding to 1221302222 its reverse (2222031221), we get a palindrome (3443333443).

The spelling of 1221302222 in words is "one billion, two hundred twenty-one million, three hundred two thousand, two hundred twenty-two".