1221334343 has 2 divisors, whose sum is σ = 1221334344. Its totient is φ = 1221334342.

The previous prime is 1221334337. The next prime is 1221334351. The reversal of 1221334343 is 3434331221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221334343 - 2⁸ = 1221334087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221334393) 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 as a sum of consecutive naturals, namely, 610667171 + 610667172.

It is an arithmetic number, because the mean of its divisors is an integer number (610667172).

Almost surely, 2^1221334343 is an apocalyptic number.

1221334343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221334343 is an equidigital number, since it uses as much as digits as its factorization.

1221334343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 26.

The square root of 1221334343 is about 34947.5942376582. The cubic root of 1221334343 is about 1068.9191470003.

Adding to 1221334343 its reverse (3434331221), we get a palindrome (4655665564).

The spelling of 1221334343 in words is "one billion, two hundred twenty-one million, three hundred thirty-four thousand, three hundred forty-three".