1220311241 has 2 divisors, whose sum is σ = 1220311242. Its totient is φ = 1220311240.

The previous prime is 1220311223. The next prime is 1220311247. The reversal of 1220311241 is 1421130221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1013785600 + 206525641 = 31840^2 + 14371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220311241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220311247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610155620 + 610155621.

It is an arithmetic number, because the mean of its divisors is an integer number (610155621).

Almost surely, 2^1220311241 is an apocalyptic number.

It is an amenable number.

1220311241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220311241 is an equidigital number, since it uses as much as digits as its factorization.

1220311241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1220311241 is about 34932.9535109759. The cubic root of 1220311241 is about 1068.6205886146.

Adding to 1220311241 its reverse (1421130221), we get a palindrome (2641441462).

The spelling of 1220311241 in words is "one billion, two hundred twenty million, three hundred eleven thousand, two hundred forty-one".