11022020221 has 4 divisors (see below), whose sum is σ = 11022326812. Its totient is φ = 11021713632.

The previous prime is 11022020183. The next prime is 11022020231. The reversal of 11022020221 is 12202022011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12202022011 = 317 ⋅38492183.

It can be written as a sum of positive squares in 2 ways, for example, as 1805060196 + 9216960025 = 42486^2 + 96005^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022020221 - 2²³ = 11013631613 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 (11022020231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90906 + ... + 174091.

It is an arithmetic number, because the mean of its divisors is an integer number (2755581703).

Almost surely, 2^11022020221 is an apocalyptic number.

It is an amenable number.

11022020221 is a deficient number, since it is larger than the sum of its proper divisors (306591).

11022020221 is an equidigital number, since it uses as much as digits as its factorization.

11022020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306590.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 11022020221 its reverse (12202022011), we get a palindrome (23224042232).

The spelling of 11022020221 in words is "eleven billion, twenty-two million, twenty thousand, two hundred twenty-one".