1221023327 has 2 divisors, whose sum is σ = 1221023328. Its totient is φ = 1221023326.

The previous prime is 1221023299. The next prime is 1221023357. The reversal of 1221023327 is 7233201221.

It is a weak prime.

It is an emirp because it is prime and its reverse (7233201221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221023327 - 2²⁰ = 1219974751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221023357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511663 + 610511664.

It is an arithmetic number, because the mean of its divisors is an integer number (610511664).

Almost surely, 2^1221023327 is an apocalyptic number.

1221023327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221023327 is an equidigital number, since it uses as much as digits as its factorization.

1221023327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1221023327 is about 34943.1442059812. The cubic root of 1221023327 is about 1068.8284049407.

Adding to 1221023327 its reverse (7233201221), we get a palindrome (8454224548).

The spelling of 1221023327 in words is "one billion, two hundred twenty-one million, twenty-three thousand, three hundred twenty-seven".