22121122211 has 8 divisors (see below), whose sum is σ = 23515685424. Its totient is φ = 20736928000.

The previous prime is 22121122187. The next prime is 22121122271. The reversal of 22121122211 is 11222112122.

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 22121122211 - 2¹⁴ = 22121105827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121122211.

It is not an unprimeable number, because it can be changed into a prime (22121122271) 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, 2587850 + ... + 2596383.

It is an arithmetic number, because the mean of its divisors is an integer number (2939460678).

Almost surely, 2^22121122211 is an apocalyptic number.

22121122211 is a deficient number, since it is larger than the sum of its proper divisors (1394563213).

22121122211 is a wasteful number, since it uses less digits than its factorization.

22121122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184501.

The product of its digits is 64, while the sum is 17.

Adding to 22121122211 its reverse (11222112122), we get a palindrome (33343234333).

The spelling of 22121122211 in words is "twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".