11021202221 has 8 divisors (see below), whose sum is σ = 11680525944. Its totient is φ = 10363102720.

The previous prime is 11021202209. The next prime is 11021202239. The reversal of 11021202221 is 12220212011.

It can be written as a sum of positive squares in 4 ways, for example, as 4782414025 + 6238788196 = 69155^2 + 78986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11021202221 - 2¹⁰ = 11021201197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021202196 and 11021202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021202121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287480 + ... + 323553.

It is an arithmetic number, because the mean of its divisors is an integer number (1460065743).

Almost surely, 2^11021202221 is an apocalyptic number.

It is an amenable number.

11021202221 is a deficient number, since it is larger than the sum of its proper divisors (659323723).

11021202221 is a wasteful number, since it uses less digits than its factorization.

11021202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612111.

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

Adding to 11021202221 its reverse (12220212011), we get a palindrome (23241414232).

The spelling of 11021202221 in words is "eleven billion, twenty-one million, two hundred two thousand, two hundred twenty-one".