1221344241 has 24 divisors (see below), whose sum is σ = 1783239840. Its totient is φ = 743124096.

The previous prime is 1221344219. The next prime is 1221344261. The reversal of 1221344241 is 1424431221.

It is not a de Polignac number, because 1221344241 - 2¹¹ = 1221342193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221344261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31590 + ... + 58656.

It is an arithmetic number, because the mean of its divisors is an integer number (74301660).

Almost surely, 2^1221344241 is an apocalyptic number.

It is an amenable number.

1221344241 is a deficient number, since it is larger than the sum of its proper divisors (561895599).

1221344241 is a wasteful number, since it uses less digits than its factorization.

1221344241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27185 (or 27172 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 1221344241 is about 34947.7358494080. The cubic root of 1221344241 is about 1068.9220345889.

Adding to 1221344241 its reverse (1424431221), we get a palindrome (2645775462).

The spelling of 1221344241 in words is "one billion, two hundred twenty-one million, three hundred forty-four thousand, two hundred forty-one".