1221222341 has 2 divisors, whose sum is σ = 1221222342. Its totient is φ = 1221222340.

The previous prime is 1221222287. The next prime is 1221222349. The reversal of 1221222341 is 1432221221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725224900 + 495997441 = 26930^2 + 22271^2 .

It is an emirp because it is prime and its reverse (1432221221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221222341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221222349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610611170 + 610611171.

It is an arithmetic number, because the mean of its divisors is an integer number (610611171).

Almost surely, 2^1221222341 is an apocalyptic number.

It is an amenable number.

1221222341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221222341 is an equidigital number, since it uses as much as digits as its factorization.

1221222341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 1221222341 is about 34945.9917730203. The cubic root of 1221222341 is about 1068.8864710606.

Adding to 1221222341 its reverse (1432221221), we get a palindrome (2653443562).

The spelling of 1221222341 in words is "one billion, two hundred twenty-one million, two hundred twenty-two thousand, three hundred forty-one".