22011221211 has 16 divisors (see below), whose sum is σ = 33543945984. Its totient is φ = 12576701664.

The previous prime is 22011221207. The next prime is 22011221249. The reversal of 22011221211 is 11212211022.

It is not a de Polignac number, because 22011221211 - 2² = 22011221207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22011221201) 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, 226816 + ... + 308978.

It is an arithmetic number, because the mean of its divisors is an integer number (2096496624).

Almost surely, 2^22011221211 is an apocalyptic number.

22011221211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22011221211 is a deficient number, since it is larger than the sum of its proper divisors (11532724773).

22011221211 is a wasteful number, since it uses less digits than its factorization.

22011221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94930.

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

Adding to 22011221211 its reverse (11212211022), we get a palindrome (33223432233).

The spelling of 22011221211 in words is "twenty-two billion, eleven million, two hundred twenty-one thousand, two hundred eleven".