11020020091 has 8 divisors (see below), whose sum is σ = 11287721984. Its totient is φ = 10752837480.

The previous prime is 11020020073. The next prime is 11020020103. The reversal of 11020020091 is 19002002011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11020020091 - 2⁷ = 11020019963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020020001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86691 + ... + 171916.

It is an arithmetic number, because the mean of its divisors is an integer number (1410965248).

Almost surely, 2^11020020091 is an apocalyptic number.

11020020091 is a deficient number, since it is larger than the sum of its proper divisors (267701893).

11020020091 is an equidigital number, since it uses as much as digits as its factorization.

11020020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259641.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 11020020091 in words is "eleven billion, twenty million, twenty thousand, ninety-one".