22122001221 has 8 divisors (see below), whose sum is σ = 29660784480. Its totient is φ = 14665609392.

The previous prime is 22122001217. The next prime is 22122001267. The reversal of 22122001221 is 12210022122.

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

It is not a de Polignac number, because 22122001221 - 2² = 22122001217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22122001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20597230 + ... + 20598303.

It is an arithmetic number, because the mean of its divisors is an integer number (3707598060).

Almost surely, 2^22122001221 is an apocalyptic number.

It is an amenable number.

22122001221 is a deficient number, since it is larger than the sum of its proper divisors (7538783259).

22122001221 is a wasteful number, since it uses less digits than its factorization.

22122001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41195715.

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

Adding to 22122001221 its reverse (12210022122), we get a palindrome (34332023343).

The spelling of 22122001221 in words is "twenty-two billion, one hundred twenty-two million, one thousand, two hundred twenty-one".