22121211211 has 8 divisors (see below), whose sum is σ = 24422981184. Its totient is φ = 19867899720.

The previous prime is 22121211209. The next prime is 22121211221. The reversal of 22121211211 is 11211212122.

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 22121211211 - 2¹ = 22121211209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121211221) 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, 12113661 + ... + 12115486.

It is an arithmetic number, because the mean of its divisors is an integer number (3052872648).

Almost surely, 2^22121211211 is an apocalyptic number.

22121211211 is a deficient number, since it is larger than the sum of its proper divisors (2301769973).

22121211211 is a wasteful number, since it uses less digits than its factorization.

22121211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24229241.

The product of its digits is 32, while the sum is 16.

Adding to 22121211211 its reverse (11211212122), we get a palindrome (33332423333).

It can be divided in two parts, 22121 and 211211, that added together give a palindrome (233332).

The spelling of 22121211211 in words is "twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eleven".