1221334423 has 2 divisors, whose sum is σ = 1221334424. Its totient is φ = 1221334422.

The previous prime is 1221334393. The next prime is 1221334447. The reversal of 1221334423 is 3244331221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221334423 - 2¹⁷ = 1221203351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221334483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610667211 + 610667212.

It is an arithmetic number, because the mean of its divisors is an integer number (610667212).

Almost surely, 2^1221334423 is an apocalyptic number.

1221334423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221334423 is an equidigital number, since it uses as much as digits as its factorization.

1221334423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 25.

The square root of 1221334423 is about 34947.5953822291. The cubic root of 1221334423 is about 1068.9191703391.

Adding to 1221334423 its reverse (3244331221), we get a palindrome (4465665644).

The spelling of 1221334423 in words is "one billion, two hundred twenty-one million, three hundred thirty-four thousand, four hundred twenty-three".