1213242241 has 4 divisors (see below), whose sum is σ = 1223979012. Its totient is φ = 1202505472.

The previous prime is 1213242227. The next prime is 1213242287. The reversal of 1213242241 is 1422423121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1422423121 = 7 ⋅203203303.

It can be written as a sum of positive squares in 2 ways, for example, as 38192400 + 1175049841 = 6180^2 + 34279^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213242241 - 2⁷ = 1213242113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213246241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368216 + ... + 5368441.

It is an arithmetic number, because the mean of its divisors is an integer number (305994753).

Almost surely, 2^1213242241 is an apocalyptic number.

It is an amenable number.

1213242241 is a deficient number, since it is larger than the sum of its proper divisors (10736771).

1213242241 is a wasteful number, since it uses less digits than its factorization.

1213242241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10736770.

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

The square root of 1213242241 is about 34831.6270220040. The cubic root of 1213242241 is about 1066.5531618264.

Adding to 1213242241 its reverse (1422423121), we get a palindrome (2635665362).

The spelling of 1213242241 in words is "one billion, two hundred thirteen million, two hundred forty-two thousand, two hundred forty-one".