11022019991 has 2 divisors, whose sum is σ = 11022019992. Its totient is φ = 11022019990.

The previous prime is 11022019979. The next prime is 11022020047. The reversal of 11022019991 is 19991022011.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11022019991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11022019901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5511009995 + 5511009996.

It is an arithmetic number, because the mean of its divisors is an integer number (5511009996).

Almost surely, 2^11022019991 is an apocalyptic number.

11022019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11022019991 is an equidigital number, since it uses as much as digits as its factorization.

11022019991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 11022019991 in words is "eleven billion, twenty-two million, nineteen thousand, nine hundred ninety-one".