212220213211 has 4 divisors (see below), whose sum is σ = 213225996424. Its totient is φ = 211214430000.

The previous prime is 212220213209. The next prime is 212220213287. The reversal of 212220213211 is 112312022212.

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 212220213211 - 2¹ = 212220213209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212220213311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502891290 + ... + 502891711.

It is an arithmetic number, because the mean of its divisors is an integer number (53306499106).

Almost surely, 2^212220213211 is an apocalyptic number.

212220213211 is a deficient number, since it is larger than the sum of its proper divisors (1005783213).

212220213211 is a wasteful number, since it uses less digits than its factorization.

212220213211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005783212.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212220213211 its reverse (112312022212), we get a palindrome (324532235423).

The spelling of 212220213211 in words is "two hundred twelve billion, two hundred twenty million, two hundred thirteen thousand, two hundred eleven".