11200120991 has 2 divisors, whose sum is σ = 11200120992. Its totient is φ = 11200120990.

The previous prime is 11200120979. The next prime is 11200121027. The reversal of 11200120991 is 19902100211.

11200120991 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 a de Polignac number, because none of the positive numbers 2^k-11200120991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11200120991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11200120951) 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, 5600060495 + 5600060496.

It is an arithmetic number, because the mean of its divisors is an integer number (5600060496).

Almost surely, 2^11200120991 is an apocalyptic number.

11200120991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11200120991 is an equidigital number, since it uses as much as digits as its factorization.

11200120991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

It can be divided in two parts, 11 and 200120991, that added together give a palindrome (200121002).

The spelling of 11200120991 in words is "eleven billion, two hundred million, one hundred twenty thousand, nine hundred ninety-one".