22002112221 has 8 divisors (see below), whose sum is σ = 29337226464. Its totient is φ = 14667536400.

The previous prime is 22002112217. The next prime is 22002112241. The reversal of 22002112221 is 12221120022.

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

It is not a de Polignac number, because 22002112221 - 2² = 22002112217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22002112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002112201) 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, 26955 + ... + 211496.

It is an arithmetic number, because the mean of its divisors is an integer number (3667153308).

Almost surely, 2^22002112221 is an apocalyptic number.

It is an amenable number.

22002112221 is a deficient number, since it is larger than the sum of its proper divisors (7335114243).

22002112221 is a wasteful number, since it uses less digits than its factorization.

22002112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269211.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22002112221 its reverse (12221120022), we get a palindrome (34223232243).

The spelling of 22002112221 in words is "twenty-two billion, two million, one hundred twelve thousand, two hundred twenty-one".