1212211241 has 2 divisors, whose sum is σ = 1212211242. Its totient is φ = 1212211240.

The previous prime is 1212211213. The next prime is 1212211243. The reversal of 1212211241 is 1421122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1103634841 + 108576400 = 33221^2 + 10420^2 .

It is an emirp because it is prime and its reverse (1421122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212211241 - 2²⁶ = 1145102377 is a prime.

Together with 1212211243, 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 (1212211243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105620 + 606105621.

It is an arithmetic number, because the mean of its divisors is an integer number (606105621).

Almost surely, 2^1212211241 is an apocalyptic number.

It is an amenable number.

1212211241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211241 is an equidigital number, since it uses as much as digits as its factorization.

1212211241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 17.

The square root of 1212211241 is about 34816.8241084680. The cubic root of 1212211241 is about 1066.2509611335.

Adding to 1212211241 its reverse (1421122121), we get a palindrome (2633333362).

The spelling of 1212211241 in words is "one billion, two hundred twelve million, two hundred eleven thousand, two hundred forty-one".