11323122991 has 2 divisors, whose sum is σ = 11323122992. Its totient is φ = 11323122990.

The previous prime is 11323122949. The next prime is 11323123039. The reversal of 11323122991 is 19922132311.

11323122991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11323122991 - 2¹¹ = 11323120943 is a prime.

It is a super-2 number, since 2×11323122991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11323122911) 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, 5661561495 + 5661561496.

It is an arithmetic number, because the mean of its divisors is an integer number (5661561496).

Almost surely, 2^11323122991 is an apocalyptic number.

11323122991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11323122991 is an equidigital number, since it uses as much as digits as its factorization.

11323122991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The spelling of 11323122991 in words is "eleven billion, three hundred twenty-three million, one hundred twenty-two thousand, nine hundred ninety-one".