1221080383 has 2 divisors, whose sum is σ = 1221080384. Its totient is φ = 1221080382.

The previous prime is 1221080339. The next prime is 1221080407. The reversal of 1221080383 is 3830801221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221080383 - 2¹³ = 1221072191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221080083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610540191 + 610540192.

It is an arithmetic number, because the mean of its divisors is an integer number (610540192).

Almost surely, 2^1221080383 is an apocalyptic number.

1221080383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221080383 is an equidigital number, since it uses as much as digits as its factorization.

1221080383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1221080383 is about 34943.9606083798. The cubic root of 1221080383 is about 1068.8450527591.

The spelling of 1221080383 in words is "one billion, two hundred twenty-one million, eighty thousand, three hundred eighty-three".