1311300421 has 2 divisors, whose sum is σ = 1311300422. Its totient is φ = 1311300420.

The previous prime is 1311300413. The next prime is 1311300553. The reversal of 1311300421 is 1240031131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801173025 + 510127396 = 28305^2 + 22586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311300421 - 2³ = 1311300413 is a prime.

It is a super-3 number, since 3×1311300421³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1311300395 and 1311300404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311300721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655650210 + 655650211.

It is an arithmetic number, because the mean of its divisors is an integer number (655650211).

Almost surely, 2^1311300421 is an apocalyptic number.

It is an amenable number.

1311300421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311300421 is an equidigital number, since it uses as much as digits as its factorization.

1311300421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1311300421 is about 36211.8823178249. The cubic root of 1311300421 is about 1094.5461227159.

Adding to 1311300421 its reverse (1240031131), we get a palindrome (2551331552).

The spelling of 1311300421 in words is "one billion, three hundred eleven million, three hundred thousand, four hundred twenty-one".