11020021110991 has 2 divisors, whose sum is σ = 11020021110992. Its totient is φ = 11020021110990.

The previous prime is 11020021110971. The next prime is 11020021111037. The reversal of 11020021110991 is 19901112002011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11020021110991 - 2³³ = 11011431176399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11020021110971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510010555495 + 5510010555496.

It is an arithmetic number, because the mean of its divisors is an integer number (5510010555496).

Almost surely, 2^{11020021110991} is an apocalyptic number.

11020021110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020021110991 is an equidigital number, since it uses as much as digits as its factorization.

11020021110991 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 28.

The spelling of 11020021110991 in words is "eleven trillion, twenty billion, twenty-one million, one hundred ten thousand, nine hundred ninety-one".