133321111111381 has 2 divisors, whose sum is σ = 133321111111382. Its totient is φ = 133321111111380.

The previous prime is 133321111111379. The next prime is 133321111111399. The reversal of 133321111111381 is 183111111123331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81683003758225 + 51638107353156 = 9037865^2 + 7185966^2 .

It is a cyclic number.

It is not a de Polignac number, because 133321111111381 - 2¹ = 133321111111379 is a prime.

It is a super-2 number, since 2×133321111111381² (a number of 29 digits) contains 22 as substring.

Together with 133321111111379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133321111141381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66660555555690 + 66660555555691.

It is an arithmetic number, because the mean of its divisors is an integer number (66660555555691).

Almost surely, 2^{133321111111381} is an apocalyptic number.

It is an amenable number.

133321111111381 is a deficient number, since it is larger than the sum of its proper divisors (1).

133321111111381 is an equidigital number, since it uses as much as digits as its factorization.

133321111111381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 31.

The spelling of 133321111111381 in words is "one hundred thirty-three trillion, three hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, three hundred eighty-one".