11220120091 has 2 divisors, whose sum is σ = 11220120092. Its totient is φ = 11220120090.

The previous prime is 11220120089. The next prime is 11220120127. The reversal of 11220120091 is 19002102211.

It is a happy number.

11220120091 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 11220120091 - 2¹ = 11220120089 is a prime.

Together with 11220120089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11220123091) 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, 5610060045 + 5610060046.

It is an arithmetic number, because the mean of its divisors is an integer number (5610060046).

Almost surely, 2^11220120091 is an apocalyptic number.

11220120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220120091 is an equidigital number, since it uses as much as digits as its factorization.

11220120091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 11220120091 in words is "eleven billion, two hundred twenty million, one hundred twenty thousand, ninety-one".