1221323241 has 8 divisors (see below), whose sum is σ = 1629252000. Its totient is φ = 813804992.

The previous prime is 1221323239. The next prime is 1221323251. The reversal of 1221323241 is 1423231221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221323241 - 2¹ = 1221323239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221323251) 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 in 7 ways as a sum of consecutive naturals, for example, 95616 + ... + 107633.

It is an arithmetic number, because the mean of its divisors is an integer number (203656500).

Almost surely, 2^1221323241 is an apocalyptic number.

It is an amenable number.

1221323241 is a deficient number, since it is larger than the sum of its proper divisors (407928759).

1221323241 is a wasteful number, since it uses less digits than its factorization.

1221323241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205255.

The product of its digits is 576, while the sum is 21.

The square root of 1221323241 is about 34947.4353994682. The cubic root of 1221323241 is about 1068.9159081448.

Adding to 1221323241 its reverse (1423231221), we get a palindrome (2644554462).

The spelling of 1221323241 in words is "one billion, two hundred twenty-one million, three hundred twenty-three thousand, two hundred forty-one".