1311116264621 has 2 divisors, whose sum is σ = 1311116264622. Its totient is φ = 1311116264620.

The previous prime is 1311116264593. The next prime is 1311116264671. The reversal of 1311116264621 is 1264626111131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274616162121 + 36500102500 = 1128989^2 + 191050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311116264621 - 2¹⁴ = 1311116248237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311116264671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655558132310 + 655558132311.

It is an arithmetic number, because the mean of its divisors is an integer number (655558132311).

Almost surely, 2^{1311116264621} is an apocalyptic number.

It is an amenable number.

1311116264621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311116264621 is an equidigital number, since it uses as much as digits as its factorization.

1311116264621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The spelling of 1311116264621 in words is "one trillion, three hundred eleven billion, one hundred sixteen million, two hundred sixty-four thousand, six hundred twenty-one".