13313220031081 has 2 divisors, whose sum is σ = 13313220031082. Its totient is φ = 13313220031080.

The previous prime is 13313220031079. The next prime is 13313220031123. The reversal of 13313220031081 is 18013002231331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11199336664681 + 2113883366400 = 3346541^2 + 1453920^2 .

It is an emirp because it is prime and its reverse (18013002231331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13313220031081 - 2¹ = 13313220031079 is a prime.

It is a super-2 number, since 2×13313220031081² (a number of 27 digits) contains 22 as substring.

Together with 13313220031079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13313220031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656610015540 + 6656610015541.

It is an arithmetic number, because the mean of its divisors is an integer number (6656610015541).

Almost surely, 2^{13313220031081} is an apocalyptic number.

It is an amenable number.

13313220031081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13313220031081 is an equidigital number, since it uses as much as digits as its factorization.

13313220031081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 13313220031081 in words is "thirteen trillion, three hundred thirteen billion, two hundred twenty million, thirty-one thousand, eighty-one".