212222021211 has 24 divisors (see below), whose sum is σ = 315237642720. Its totient is φ = 137478352896.

The previous prime is 212222021189. The next prime is 212222021239. The reversal of 212222021211 is 112120222212.

It is a happy number.

212222021211 is a `hidden beast` number, since 212 + 2 + 220 + 21 + 211 = 666.

It is not a de Polignac number, because 212222021211 - 2¹⁸ = 212221759067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212222031211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158295 + ... + 670448.

It is an arithmetic number, because the mean of its divisors is an integer number (13134901780).

Almost surely, 2^212222021211 is an apocalyptic number.

212222021211 is a deficient number, since it is larger than the sum of its proper divisors (103015621509).

212222021211 is a wasteful number, since it uses less digits than its factorization.

212222021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829555 (or 829552 counting only the distinct ones).

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

Adding to 212222021211 its reverse (112120222212), we get a palindrome (324342243423).

The spelling of 212222021211 in words is "two hundred twelve billion, two hundred twenty-two million, twenty-one thousand, two hundred eleven".