212200022221 has 4 divisors (see below), whose sum is σ = 231490933344. Its totient is φ = 192909111100.

The previous prime is 212200022213. The next prime is 212200022231. The reversal of 212200022221 is 122220002212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212200022221 - 2³ = 212200022213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212200022195 and 212200022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200022231) 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, 9645455545 + ... + 9645455566.

It is an arithmetic number, because the mean of its divisors is an integer number (57872733336).

Almost surely, 2^212200022221 is an apocalyptic number.

It is an amenable number.

212200022221 is a deficient number, since it is larger than the sum of its proper divisors (19290911123).

212200022221 is a wasteful number, since it uses less digits than its factorization.

212200022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19290911122.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 212200022221 its reverse (122220002212), we get a palindrome (334420024433).

The spelling of 212200022221 in words is "two hundred twelve billion, two hundred million, twenty-two thousand, two hundred twenty-one".