1303221061 has 2 divisors, whose sum is σ = 1303221062. Its totient is φ = 1303221060.

The previous prime is 1303221011. The next prime is 1303221083. The reversal of 1303221061 is 1601223031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1205408961 + 97812100 = 34719^2 + 9890^2 .

It is an emirp because it is prime and its reverse (1601223031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1303221061 - 2²⁷ = 1169003333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651610530 + 651610531.

It is an arithmetic number, because the mean of its divisors is an integer number (651610531).

Almost surely, 2^1303221061 is an apocalyptic number.

It is an amenable number.

1303221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303221061 is an equidigital number, since it uses as much as digits as its factorization.

1303221061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1303221061 is about 36100.1531991209. The cubic root of 1303221061 is about 1092.2935352639.

Adding to 1303221061 its reverse (1601223031), we get a palindrome (2904444092).

The spelling of 1303221061 in words is "one billion, three hundred three million, two hundred twenty-one thousand, sixty-one".