13331323081 has 2 divisors, whose sum is σ = 13331323082. Its totient is φ = 13331323080.

The previous prime is 13331323079. The next prime is 13331323129. The reversal of 13331323081 is 18032313331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10103265225 + 3228057856 = 100515^2 + 56816^2 .

It is a cyclic number.

It is not a de Polignac number, because 13331323081 - 2¹ = 13331323079 is a prime.

It is a super-2 number, since 2×13331323081² (a number of 21 digits) contains 22 as substring.

Together with 13331323079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13331323021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665661540 + 6665661541.

It is an arithmetic number, because the mean of its divisors is an integer number (6665661541).

Almost surely, 2^13331323081 is an apocalyptic number.

It is an amenable number.

13331323081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331323081 is an equidigital number, since it uses as much as digits as its factorization.

13331323081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 13331323081 in words is "thirteen billion, three hundred thirty-one million, three hundred twenty-three thousand, eighty-one".