212222211211 has 16 divisors (see below), whose sum is σ = 231987352320. Its totient is φ = 193267952640.

The previous prime is 212222211209. The next prime is 212222211293. The reversal of 212222211211 is 112112222212.

It is a cyclic number.

It is not a de Polignac number, because 212222211211 - 2¹ = 212222211209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222211011) 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, 4316455 + ... + 4365343.

It is an arithmetic number, because the mean of its divisors is an integer number (14499209520).

Almost surely, 2^212222211211 is an apocalyptic number.

212222211211 is a deficient number, since it is larger than the sum of its proper divisors (19765141109).

212222211211 is a wasteful number, since it uses less digits than its factorization.

212222211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57174.

The product of its digits is 128, while the sum is 19.

Adding to 212222211211 its reverse (112112222212), we get a palindrome (324334433423).

The spelling of 212222211211 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eleven".