1213303361 has 2 divisors, whose sum is σ = 1213303362. Its totient is φ = 1213303360.

The previous prime is 1213303319. The next prime is 1213303391. The reversal of 1213303361 is 1633033121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1107624961 + 105678400 = 33281^2 + 10280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213303361 - 2¹⁸ = 1213041217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213303391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606651680 + 606651681.

It is an arithmetic number, because the mean of its divisors is an integer number (606651681).

Almost surely, 2^1213303361 is an apocalyptic number.

It is an amenable number.

1213303361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213303361 is an equidigital number, since it uses as much as digits as its factorization.

1213303361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1213303361 is about 34832.5043745063. The cubic root of 1213303361 is about 1066.5710715871.

Adding to 1213303361 its reverse (1633033121), we get a palindrome (2846336482).

The spelling of 1213303361 in words is "one billion, two hundred thirteen million, three hundred three thousand, three hundred sixty-one".