1222120243 has 8 divisors (see below), whose sum is σ = 1251364400. Its totient is φ = 1192913568.

The previous prime is 1222120213. The next prime is 1222120253. The reversal of 1222120243 is 3420212221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1222120243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222120243.

It is not an unprimeable number, because it can be changed into a prime (1222120213) 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 7 ways as a sum of consecutive naturals, for example, 63253 + ... + 80281.

It is an arithmetic number, because the mean of its divisors is an integer number (156420550).

Almost surely, 2^1222120243 is an apocalyptic number.

1222120243 is a deficient number, since it is larger than the sum of its proper divisors (29244157).

1222120243 is a wasteful number, since it uses less digits than its factorization.

1222120243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18741.

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

The square root of 1222120243 is about 34958.8364079813. The cubic root of 1222120243 is about 1069.1483726391.

Adding to 1222120243 its reverse (3420212221), we get a palindrome (4642332464).

The spelling of 1222120243 in words is "one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred forty-three".