11210221021 has 4 divisors (see below), whose sum is σ = 11214226044. Its totient is φ = 11206216000.

The previous prime is 11210221013. The next prime is 11210221051. The reversal of 11210221021 is 12012201211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5146484121 + 6063736900 = 71739^2 + 77870^2 .

It is a cyclic number.

It is not a de Polignac number, because 11210221021 - 2³ = 11210221013 is a prime.

It is a super-3 number, since 3×11210221021³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11210220992 and 11210221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1998310 + ... + 2003911.

It is an arithmetic number, because the mean of its divisors is an integer number (2803556511).

Almost surely, 2^11210221021 is an apocalyptic number.

It is an amenable number.

11210221021 is a deficient number, since it is larger than the sum of its proper divisors (4005023).

11210221021 is an equidigital number, since it uses as much as digits as its factorization.

11210221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11210221021 its reverse (12012201211), we get a palindrome (23222422232).

The spelling of 11210221021 in words is "eleven billion, two hundred ten million, two hundred twenty-one thousand, twenty-one".