1303130221 has 2 divisors, whose sum is σ = 1303130222. Its totient is φ = 1303130220.

The previous prime is 1303130197. The next prime is 1303130233. The reversal of 1303130221 is 1220313031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1282427721 + 20702500 = 35811^2 + 4550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303130221 - 2¹⁷ = 1302999149 is a prime.

It is a super-3 number, since 3×1303130221³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1303130195 and 1303130204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303130261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651565110 + 651565111.

It is an arithmetic number, because the mean of its divisors is an integer number (651565111).

Almost surely, 2^1303130221 is an apocalyptic number.

It is an amenable number.

1303130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303130221 is an equidigital number, since it uses as much as digits as its factorization.

1303130221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1303130221 is about 36098.8950107895. The cubic root of 1303130221 is about 1092.2681555200.

Adding to 1303130221 its reverse (1220313031), we get a palindrome (2523443252).

The spelling of 1303130221 in words is "one billion, three hundred three million, one hundred thirty thousand, two hundred twenty-one".