1311424224221 has 2 divisors, whose sum is σ = 1311424224222. Its totient is φ = 1311424224220.

The previous prime is 1311424224179. The next prime is 1311424224263. The reversal of 1311424224221 is 1224224241131.

It is a balanced prime because it is at equal distance from previous prime (1311424224179) and next prime (1311424224263).

It can be written as a sum of positive squares in only one way, i.e., 1259433840025 + 51990384196 = 1122245^2 + 228014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311424224221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311424224521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655712112110 + 655712112111.

It is an arithmetic number, because the mean of its divisors is an integer number (655712112111).

Almost surely, 2^{1311424224221} is an apocalyptic number.

It is an amenable number.

1311424224221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311424224221 is an equidigital number, since it uses as much as digits as its factorization.

1311424224221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 29.

Adding to 1311424224221 its reverse (1224224241131), we get a palindrome (2535648465352).

The spelling of 1311424224221 in words is "one trillion, three hundred eleven billion, four hundred twenty-four million, two hundred twenty-four thousand, two hundred twenty-one".