130311321221 has 2 divisors, whose sum is σ = 130311321222. Its totient is φ = 130311321220.

The previous prime is 130311321209. The next prime is 130311321223. The reversal of 130311321221 is 122123113031.

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., 130310892196 + 429025 = 360986^2 + 655^2 .

It is an emirp because it is prime and its reverse (122123113031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130311321221 - 2¹⁸ = 130311059077 is a prime.

Together with 130311321223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 130311321193 and 130311321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130311321223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65155660610 + 65155660611.

It is an arithmetic number, because the mean of its divisors is an integer number (65155660611).

Almost surely, 2^130311321221 is an apocalyptic number.

It is an amenable number.

130311321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

130311321221 is an equidigital number, since it uses as much as digits as its factorization.

130311321221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 130311321221 its reverse (122123113031), we get a palindrome (252434434252).

The spelling of 130311321221 in words is "one hundred thirty billion, three hundred eleven million, three hundred twenty-one thousand, two hundred twenty-one".