1313102221 has 2 divisors, whose sum is σ = 1313102222. Its totient is φ = 1313102220.

The previous prime is 1313102209. The next prime is 1313102227. The reversal of 1313102221 is 1222013131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 845937225 + 467164996 = 29085^2 + 21614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313102221 - 2²⁷ = 1178884493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313102195 and 1313102204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313102227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656551110 + 656551111.

It is an arithmetic number, because the mean of its divisors is an integer number (656551111).

Almost surely, 2^1313102221 is an apocalyptic number.

It is an amenable number.

1313102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313102221 is an equidigital number, since it uses as much as digits as its factorization.

1313102221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1313102221 is about 36236.7523517216. The cubic root of 1313102221 is about 1095.0472157730.

Adding to 1313102221 its reverse (1222013131), we get a palindrome (2535115352).

The spelling of 1313102221 in words is "one billion, three hundred thirteen million, one hundred two thousand, two hundred twenty-one".