13312020203281 has 2 divisors, whose sum is σ = 13312020203282. Its totient is φ = 13312020203280.

The previous prime is 13312020203257. The next prime is 13312020203309. The reversal of 13312020203281 is 18230202021331.

It is an a-pointer prime, because the next prime (13312020203309) can be obtained adding 13312020203281 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11102757126400 + 2209263076881 = 3332080^2 + 1486359^2 .

It is a cyclic number.

It is not a de Polignac number, because 13312020203281 - 2³⁹ = 12762264389393 is a prime.

It is a super-2 number, since 2×13312020203281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13312020206281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656010101640 + 6656010101641.

It is an arithmetic number, because the mean of its divisors is an integer number (6656010101641).

Almost surely, 2^{13312020203281} is an apocalyptic number.

It is an amenable number.

13312020203281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13312020203281 is an equidigital number, since it uses as much as digits as its factorization.

13312020203281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 13312020203281 in words is "thirteen trillion, three hundred twelve billion, twenty million, two hundred three thousand, two hundred eighty-one".