1220222243 has 16 divisors (see below), whose sum is σ = 1349752896. Its totient is φ = 1097226240.

The previous prime is 1220222221. The next prime is 1220222249. The reversal of 1220222243 is 3422220221.

It is not a de Polignac number, because 1220222243 - 2¹² = 1220218147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220222249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531005 + ... + 533297.

It is an arithmetic number, because the mean of its divisors is an integer number (84359556).

Almost surely, 2^1220222243 is an apocalyptic number.

1220222243 is a deficient number, since it is larger than the sum of its proper divisors (129530653).

1220222243 is a wasteful number, since it uses less digits than its factorization.

1220222243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1220222243 is about 34931.6796475635. The cubic root of 1220222243 is about 1068.5946096118.

Adding to 1220222243 its reverse (3422220221), we get a palindrome (4642442464).

The spelling of 1220222243 in words is "one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred forty-three".