22221221211 has 16 divisors (see below), whose sum is σ = 37623232000. Its totient is φ = 12697840584.

The previous prime is 22221221201. The next prime is 22221221249. The reversal of 22221221211 is 11212212222.

It is a happy number.

22221221211 is a `hidden beast` number, since 222 + 212 + 21 + 211 = 666.

It is not a de Polignac number, because 22221221211 - 2⁷ = 22221221083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221221201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58786111 + ... + 58786488.

It is an arithmetic number, because the mean of its divisors is an integer number (2351452000).

Almost surely, 2^22221221211 is an apocalyptic number.

22221221211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22221221211 is a deficient number, since it is larger than the sum of its proper divisors (15402010789).

22221221211 is a wasteful number, since it uses less digits than its factorization.

22221221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117572615 (or 117572609 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 22221221211 its reverse (11212212222), we get a palindrome (33433433433).

The spelling of 22221221211 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".