22121102221211 has 12 divisors (see below), whose sum is σ = 25732931341968. Its totient is φ = 18960782217552.

The previous prime is 22121102221187. The next prime is 22121102221217. The reversal of 22121102221211 is 11212220112122.

It is not a de Polignac number, because 22121102221211 - 2⁶ = 22121102221147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121102221217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4024610 + ... + 7774296.

It is an arithmetic number, because the mean of its divisors is an integer number (2144410945164).

Almost surely, 2^{22121102221211} is an apocalyptic number.

22121102221211 is a deficient number, since it is larger than the sum of its proper divisors (3611829120757).

22121102221211 is a wasteful number, since it uses less digits than its factorization.

22121102221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870098 (or 3870091 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22121102221211 its reverse (11212220112122), we get a palindrome (33333322333333).

The spelling of 22121102221211 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, two hundred eleven".