1301310221 has 2 divisors, whose sum is σ = 1301310222. Its totient is φ = 1301310220.

The previous prime is 1301310211. The next prime is 1301310229. The reversal of 1301310221 is 1220131031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 993132196 + 308178025 = 31514^2 + 17555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1301310221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1301310196 and 1301310205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301310229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650655110 + 650655111.

It is an arithmetic number, because the mean of its divisors is an integer number (650655111).

Almost surely, 2^1301310221 is an apocalyptic number.

It is an amenable number.

1301310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301310221 is an equidigital number, since it uses as much as digits as its factorization.

1301310221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1301310221 is about 36073.6776750029. The cubic root of 1301310221 is about 1091.7594178664.

Adding to 1301310221 its reverse (1220131031), we get a palindrome (2521441252).

The spelling of 1301310221 in words is "one billion, three hundred one million, three hundred ten thousand, two hundred twenty-one".