22221030221 has 4 divisors (see below), whose sum is σ = 23930340252. Its totient is φ = 20511720192.

The previous prime is 22221030211. The next prime is 22221030283. The reversal of 22221030221 is 12203012222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12203012222 = 2 ⋅6101506111.

It can be written as a sum of positive squares in 2 ways, for example, as 5747307721 + 16473722500 = 75811^2 + 128350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221030221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22221030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221030211) 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, 854654996 + ... + 854655021.

It is an arithmetic number, because the mean of its divisors is an integer number (5982585063).

Almost surely, 2^22221030221 is an apocalyptic number.

It is an amenable number.

22221030221 is a deficient number, since it is larger than the sum of its proper divisors (1709310031).

22221030221 is a wasteful number, since it uses less digits than its factorization.

22221030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709310030.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22221030221 its reverse (12203012222), we get a palindrome (34424042443).

The spelling of 22221030221 in words is "twenty-two billion, two hundred twenty-one million, thirty thousand, two hundred twenty-one".