212023221211 has 16 divisors (see below), whose sum is σ = 221963328000. Its totient is φ = 202272784000.

The previous prime is 212023221187. The next prime is 212023221253. The reversal of 212023221211 is 112122320212.

It is a cyclic number.

It is not a de Polignac number, because 212023221211 - 2²⁷ = 211889003483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212023221511) 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, 696861 + ... + 953761.

It is an arithmetic number, because the mean of its divisors is an integer number (13872708000).

Almost surely, 2^212023221211 is an apocalyptic number.

212023221211 is a deficient number, since it is larger than the sum of its proper divisors (9940106789).

212023221211 is a wasteful number, since it uses less digits than its factorization.

212023221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257270.

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

Adding to 212023221211 its reverse (112122320212), we get a palindrome (324145541423).

Subtracting from 212023221211 its reverse (112122320212), we obtain a palindrome (99900900999).

The spelling of 212023221211 in words is "two hundred twelve billion, twenty-three million, two hundred twenty-one thousand, two hundred eleven".