211212200221 has 8 divisors (see below), whose sum is σ = 233002224000. Its totient is φ = 189853662240.

The previous prime is 211212200123. The next prime is 211212200237. The reversal of 211212200221 is 122002212112.

It is a happy number.

211212200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211212200221 - 2⁷ = 211212200093 is a prime.

It is a super-2 number, since 2×211212200221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211212200195 and 211212200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212200291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107870421 + ... + 107872378.

It is an arithmetic number, because the mean of its divisors is an integer number (29125278000).

Almost surely, 2^211212200221 is an apocalyptic number.

It is an amenable number.

211212200221 is a deficient number, since it is larger than the sum of its proper divisors (21790023779).

211212200221 is a wasteful number, since it uses less digits than its factorization.

211212200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215742899.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211212200221 its reverse (122002212112), we get a palindrome (333214412333).

It can be divided in two parts, 2112 and 12200221, that multiplied together give a palindrome (25766866752).

The spelling of 211212200221 in words is "two hundred eleven billion, two hundred twelve million, two hundred thousand, two hundred twenty-one".