1313103221 has 2 divisors, whose sum is σ = 1313103222. Its totient is φ = 1313103220.

The previous prime is 1313103193. The next prime is 1313103227. The reversal of 1313103221 is 1223013131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055340196 + 257763025 = 32486^2 + 16055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313103221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1313103221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313103227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656551610 + 656551611.

It is an arithmetic number, because the mean of its divisors is an integer number (656551611).

Almost surely, 2^1313103221 is an apocalyptic number.

It is an amenable number.

1313103221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313103221 is an equidigital number, since it uses as much as digits as its factorization.

1313103221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1313103221 is about 36236.7661498650. The cubic root of 1313103221 is about 1095.0474937526.

Adding to 1313103221 its reverse (1223013131), we get a palindrome (2536116352).

The spelling of 1313103221 in words is "one billion, three hundred thirteen million, one hundred three thousand, two hundred twenty-one".