22001211211 has 4 divisors (see below), whose sum is σ = 25144241392. Its totient is φ = 18858181032.

The previous prime is 22001211191. The next prime is 22001211217. The reversal of 22001211211 is 11211210022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22001211211 - 2⁵ = 22001211179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001211191 and 22001211200.

It is not an unprimeable number, because it can be changed into a prime (22001211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571515080 + ... + 1571515093.

It is an arithmetic number, because the mean of its divisors is an integer number (6286060348).

Almost surely, 2^22001211211 is an apocalyptic number.

22001211211 is a deficient number, since it is larger than the sum of its proper divisors (3143030181).

22001211211 is an equidigital number, since it uses as much as digits as its factorization.

22001211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143030180.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22001211211 its reverse (11211210022), we get a palindrome (33212421233).

The spelling of 22001211211 in words is "twenty-two billion, one million, two hundred eleven thousand, two hundred eleven".