1341221221 has 2 divisors, whose sum is σ = 1341221222. Its totient is φ = 1341221220.

The previous prime is 1341221207. The next prime is 1341221279. The reversal of 1341221221 is 1221221431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1250400321 + 90820900 = 35361^2 + 9530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1341221221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1341221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670610610 + 670610611.

It is an arithmetic number, because the mean of its divisors is an integer number (670610611).

Almost surely, 2^1341221221 is an apocalyptic number.

It is an amenable number.

1341221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1341221221 is an equidigital number, since it uses as much as digits as its factorization.

1341221221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 1341221221 is about 36622.6872443845. The cubic root of 1341221221 is about 1102.8085862064.

Adding to 1341221221 its reverse (1221221431), we get a palindrome (2562442652).

The spelling of 1341221221 in words is "one billion, three hundred forty-one million, two hundred twenty-one thousand, two hundred twenty-one".