11021020020191 has 4 divisors (see below), whose sum is σ = 11069146745400. Its totient is φ = 10972893294984.

The previous prime is 11021020020163. The next prime is 11021020020193. The reversal of 11021020020191 is 19102002012011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11021020020191 - 2¹⁰ = 11021020019167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021020020193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24063362261 + ... + 24063362718.

It is an arithmetic number, because the mean of its divisors is an integer number (2767286686350).

Almost surely, 2^{11021020020191} is an apocalyptic number.

11021020020191 is a deficient number, since it is larger than the sum of its proper divisors (48126725209).

11021020020191 is an equidigital number, since it uses as much as digits as its factorization.

11021020020191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48126725208.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 11021020020191 in words is "eleven trillion, twenty-one billion, twenty million, twenty thousand, one hundred ninety-one".