1221223303 has 2 divisors, whose sum is σ = 1221223304. Its totient is φ = 1221223302.

The previous prime is 1221223301. The next prime is 1221223313. The reversal of 1221223303 is 3033221221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221223303 - 2¹ = 1221223301 is a prime.

Together with 1221223301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221223301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610611651 + 610611652.

It is an arithmetic number, because the mean of its divisors is an integer number (610611652).

Almost surely, 2^1221223303 is an apocalyptic number.

1221223303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221223303 is an equidigital number, since it uses as much as digits as its factorization.

1221223303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1221223303 is about 34946.0055371140. The cubic root of 1221223303 is about 1068.8867517271.

Adding to 1221223303 its reverse (3033221221), we get a palindrome (4254444524).

The spelling of 1221223303 in words is "one billion, two hundred twenty-one million, two hundred twenty-three thousand, three hundred three".