22110521491 has 2 divisors, whose sum is σ = 22110521492. Its totient is φ = 22110521490.

The previous prime is 22110521449. The next prime is 22110521497. The reversal of 22110521491 is 19412501122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22110521491 - 2¹¹ = 22110519443 is a prime.

It is not a weakly prime, because it can be changed into another prime (22110521497) 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, 11055260745 + 11055260746.

It is an arithmetic number, because the mean of its divisors is an integer number (11055260746).

Almost surely, 2^22110521491 is an apocalyptic number.

22110521491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22110521491 is an equidigital number, since it uses as much as digits as its factorization.

22110521491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 22110521491 in words is "twenty-two billion, one hundred ten million, five hundred twenty-one thousand, four hundred ninety-one".