11210020021 has 6 divisors (see below), whose sum is σ = 11310114530. Its totient is φ = 11110803648.

The previous prime is 11210019971. The next prime is 11210020033. The reversal of 11210020021 is 12002001211.

11210020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 208947025 + 11001072996 = 14455^2 + 104886^2 .

It is not a de Polignac number, because 11210020021 - 2¹³ = 11210011829 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 (11210020051) 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 5 ways as a sum of consecutive naturals, for example, 426186 + ... + 451723.

Almost surely, 2^11210020021 is an apocalyptic number.

It is an amenable number.

11210020021 is a deficient number, since it is larger than the sum of its proper divisors (100094509).

11210020021 is an frugal number, since it uses more digits than its factorization.

11210020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878135 (or 878022 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11210020021 its reverse (12002001211), we get a palindrome (23212021232).

The spelling of 11210020021 in words is "eleven billion, two hundred ten million, twenty thousand, twenty-one".