11381971369 has 2 divisors, whose sum is σ = 11381971370. Its totient is φ = 11381971368.

The previous prime is 11381971357. The next prime is 11381971379. The reversal of 11381971369 is 96317918311.

11381971369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10814960025 + 567011344 = 103995^2 + 23812^2 .

It is a cyclic number.

It is not a de Polignac number, because 11381971369 - 2¹⁷ = 11381840297 is a prime.

It is a super-2 number, since 2×11381971369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11381971379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5690985684 + 5690985685.

It is an arithmetic number, because the mean of its divisors is an integer number (5690985685).

Almost surely, 2^11381971369 is an apocalyptic number.

It is an amenable number.

11381971369 is a deficient number, since it is larger than the sum of its proper divisors (1).

11381971369 is an equidigital number, since it uses as much as digits as its factorization.

11381971369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The spelling of 11381971369 in words is "eleven billion, three hundred eighty-one million, nine hundred seventy-one thousand, three hundred sixty-nine".