13000959721381 has 2 divisors, whose sum is σ = 13000959721382. Its totient is φ = 13000959721380.

The previous prime is 13000959721223. The next prime is 13000959721391. The reversal of 13000959721381 is 18312795900031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9876783280225 + 3124176441156 = 3142735^2 + 1767534^2 .

It is an emirp because it is prime and its reverse (18312795900031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13000959721381 - 2²³ = 13000951332773 is a prime.

It is a super-2 number, since 2×13000959721381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13000959721391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6500479860690 + 6500479860691.

It is an arithmetic number, because the mean of its divisors is an integer number (6500479860691).

Almost surely, 2^{13000959721381} is an apocalyptic number.

It is an amenable number.

13000959721381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13000959721381 is an equidigital number, since it uses as much as digits as its factorization.

13000959721381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 13000959721381 in words is "thirteen trillion, nine hundred fifty-nine million, seven hundred twenty-one thousand, three hundred eighty-one".