11020021111 has 4 divisors (see below), whose sum is σ = 12021841224. Its totient is φ = 10018201000.

The previous prime is 11020021043. The next prime is 11020021193. The reversal of 11020021111 is 11112002011.

11020021111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11020021111 - 2¹¹ = 11020019063 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 (11020061111) 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 in 3 ways as a sum of consecutive naturals, for example, 500910040 + ... + 500910061.

It is an arithmetic number, because the mean of its divisors is an integer number (3005460306).

Almost surely, 2^11020021111 is an apocalyptic number.

11020021111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11020021111 is a deficient number, since it is larger than the sum of its proper divisors (1001820113).

11020021111 is a wasteful number, since it uses less digits than its factorization.

11020021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001820112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11020021111 its reverse (11112002011), we get a palindrome (22132023122).

The spelling of 11020021111 in words is "eleven billion, twenty million, twenty-one thousand, one hundred eleven".