1221466361 has 2 divisors, whose sum is σ = 1221466362. Its totient is φ = 1221466360.

The previous prime is 1221466339. The next prime is 1221466387. The reversal of 1221466361 is 1636641221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166632336 + 54834025 = 34156^2 + 7405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221466361 - 2⁶ = 1221466297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221463361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610733180 + 610733181.

It is an arithmetic number, because the mean of its divisors is an integer number (610733181).

Almost surely, 2^1221466361 is an apocalyptic number.

It is an amenable number.

1221466361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221466361 is an equidigital number, since it uses as much as digits as its factorization.

1221466361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 1221466361 is about 34949.4829861616. The cubic root of 1221466361 is about 1068.9576599280.

The spelling of 1221466361 in words is "one billion, two hundred twenty-one million, four hundred sixty-six thousand, three hundred sixty-one".