22101211221 has 32 divisors (see below), whose sum is σ = 31666609920. Its totient is φ = 13675267584.

The previous prime is 22101211189. The next prime is 22101211229. The reversal of 22101211221 is 12211210122.

It is not a de Polignac number, because 22101211221 - 2⁵ = 22101211189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22101211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101211229) 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 31 ways as a sum of consecutive naturals, for example, 940665 + ... + 963873.

It is an arithmetic number, because the mean of its divisors is an integer number (989581560).

Almost surely, 2^22101211221 is an apocalyptic number.

It is an amenable number.

22101211221 is a deficient number, since it is larger than the sum of its proper divisors (9565398699).

22101211221 is a wasteful number, since it uses less digits than its factorization.

22101211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23645.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22101211221 its reverse (12211210122), we get a palindrome (34312421343).

The spelling of 22101211221 in words is "twenty-two billion, one hundred one million, two hundred eleven thousand, two hundred twenty-one".