1221301241 has 2 divisors, whose sum is σ = 1221301242. Its totient is φ = 1221301240.

The previous prime is 1221301231. The next prime is 1221301243. The reversal of 1221301241 is 1421031221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1180609600 + 40691641 = 34360^2 + 6379^2 .

It is an emirp because it is prime and its reverse (1421031221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221301241 - 2³⁰ = 147559417 is a prime.

Together with 1221301243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1221301243) 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, 610650620 + 610650621.

It is an arithmetic number, because the mean of its divisors is an integer number (610650621).

Almost surely, 2^1221301241 is an apocalyptic number.

It is an amenable number.

1221301241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221301241 is an equidigital number, since it uses as much as digits as its factorization.

1221301241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1221301241 is about 34947.1206396178. The cubic root of 1221301241 is about 1068.9094898901.

Adding to 1221301241 its reverse (1421031221), we get a palindrome (2642332462).

The spelling of 1221301241 in words is "one billion, two hundred twenty-one million, three hundred one thousand, two hundred forty-one".