1221243241 has 8 divisors (see below), whose sum is σ = 1244170368. Its totient is φ = 1198410000.

The previous prime is 1221243223. The next prime is 1221243269. The reversal of 1221243241 is 1423421221.

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 1221243241 - 2⁵ = 1221243209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221243211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3066 + ... + 49516.

It is an arithmetic number, because the mean of its divisors is an integer number (155521296).

Almost surely, 2^1221243241 is an apocalyptic number.

It is an amenable number.

1221243241 is a deficient number, since it is larger than the sum of its proper divisors (22927127).

1221243241 is an equidigital number, since it uses as much as digits as its factorization.

1221243241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46943.

The product of its digits is 768, while the sum is 22.

The square root of 1221243241 is about 34946.2908046047. The cubic root of 1221243241 is about 1068.8925686671.

Adding to 1221243241 its reverse (1423421221), we get a palindrome (2644664462).

The spelling of 1221243241 in words is "one billion, two hundred twenty-one million, two hundred forty-three thousand, two hundred forty-one".