22012011221 has 8 divisors (see below), whose sum is σ = 22190192640. Its totient is φ = 21833905968.

The previous prime is 22012011199. The next prime is 22012011313. The reversal of 22012011221 is 12211021022.

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 22012011221 - 2¹⁸ = 22011749077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012011196 and 22012011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012011121) 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, 657920 + ... + 690566.

It is an arithmetic number, because the mean of its divisors is an integer number (2773774080).

Almost surely, 2^22012011221 is an apocalyptic number.

It is an amenable number.

22012011221 is a deficient number, since it is larger than the sum of its proper divisors (178181419).

22012011221 is a wasteful number, since it uses less digits than its factorization.

22012011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38083.

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

Adding to 22012011221 its reverse (12211021022), we get a palindrome (34223032243).

The spelling of 22012011221 in words is "twenty-two billion, twelve million, eleven thousand, two hundred twenty-one".