11022021221 has 4 divisors (see below), whose sum is σ = 11208835200. Its totient is φ = 10835207244.

The previous prime is 11022021203. The next prime is 11022021229. The reversal of 11022021221 is 12212022011.

11022021221 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11022021221 - 2²² = 11017826917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11022021196 and 11022021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022021229) 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, 93406901 + ... + 93407018.

It is an arithmetic number, because the mean of its divisors is an integer number (2802208800).

Almost surely, 2^11022021221 is an apocalyptic number.

It is an amenable number.

11022021221 is a deficient number, since it is larger than the sum of its proper divisors (186813979).

11022021221 is an equidigital number, since it uses as much as digits as its factorization.

11022021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186813978.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11022021221 its reverse (12212022011), we get a palindrome (23234043232).

The spelling of 11022021221 in words is "eleven billion, twenty-two million, twenty-one thousand, two hundred twenty-one".