212203211 has 4 divisors (see below), whose sum is σ = 231494424. Its totient is φ = 192912000.

The previous prime is 212203193. The next prime is 212203223. The reversal of 212203211 is 112302212.

It is a happy number.

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 212203211 - 2²² = 208008907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212203291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9645590 + ... + 9645611.

It is an arithmetic number, because the mean of its divisors is an integer number (57873606).

Almost surely, 2^212203211 is an apocalyptic number.

212203211 is a deficient number, since it is larger than the sum of its proper divisors (19291213).

212203211 is a wasteful number, since it uses less digits than its factorization.

212203211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19291212.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212203211 is about 14567.1964015043. The cubic root of 212203211 is about 596.4636526575.

Adding to 212203211 its reverse (112302212), we get a palindrome (324505423).

Subtracting from 212203211 its reverse (112302212), we obtain a palindrome (99900999).

The spelling of 212203211 in words is "two hundred twelve million, two hundred three thousand, two hundred eleven".