1221341327 has 2 divisors, whose sum is σ = 1221341328. Its totient is φ = 1221341326.

The previous prime is 1221341321. The next prime is 1221341411. The reversal of 1221341327 is 7231431221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221341327 - 2⁴ = 1221341311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221341296 and 1221341305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221341321) 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, 610670663 + 610670664.

It is an arithmetic number, because the mean of its divisors is an integer number (610670664).

Almost surely, 2^1221341327 is an apocalyptic number.

1221341327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221341327 is an equidigital number, since it uses as much as digits as its factorization.

1221341327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 1221341327 is about 34947.6941585564. The cubic root of 1221341327 is about 1068.9211844760.

Adding to 1221341327 its reverse (7231431221), we get a palindrome (8452772548).

The spelling of 1221341327 in words is "one billion, two hundred twenty-one million, three hundred forty-one thousand, three hundred twenty-seven".