13121019933869 has 2 divisors, whose sum is σ = 13121019933870. Its totient is φ = 13121019933868.

The previous prime is 13121019933851. The next prime is 13121019933887. The reversal of 13121019933869 is 96833991012131.

It is a balanced prime because it is at equal distance from previous prime (13121019933851) and next prime (13121019933887).

It can be written as a sum of positive squares in only one way, i.e., 12947079222025 + 173940711844 = 3598205^2 + 417062^2 .

It is an emirp because it is prime and its reverse (96833991012131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121019933869 is a prime.

It is a super-2 number, since 2×13121019933869² (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 (13121019935869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560509966934 + 6560509966935.

It is an arithmetic number, because the mean of its divisors is an integer number (6560509966935).

Almost surely, 2^{13121019933869} is an apocalyptic number.

It is an amenable number.

13121019933869 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121019933869 is an equidigital number, since it uses as much as digits as its factorization.

13121019933869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The spelling of 13121019933869 in words is "thirteen trillion, one hundred twenty-one billion, nineteen million, nine hundred thirty-three thousand, eight hundred sixty-nine".