11331330031081 has 2 divisors, whose sum is σ = 11331330031082. Its totient is φ = 11331330031080.

The previous prime is 11331330031079. The next prime is 11331330031117. The reversal of 11331330031081 is 18013003313311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6582221261056 + 4749108770025 = 2565584^2 + 2179245^2 .

It is an emirp because it is prime and its reverse (18013003313311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11331330031081 - 2¹ = 11331330031079 is a prime.

It is a super-2 number, since 2×11331330031081² (a number of 27 digits) contains 22 as substring.

Together with 11331330031079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11331330731081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665665015540 + 5665665015541.

It is an arithmetic number, because the mean of its divisors is an integer number (5665665015541).

Almost surely, 2^{11331330031081} is an apocalyptic number.

It is an amenable number.

11331330031081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331330031081 is an equidigital number, since it uses as much as digits as its factorization.

11331330031081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

Adding to 11331330031081 its reverse (18013003313311), we get a palindrome (29344333344392).

The spelling of 11331330031081 in words is "eleven trillion, three hundred thirty-one billion, three hundred thirty million, thirty-one thousand, eighty-one".