211202221202221 has 16 divisors (see below), whose sum is σ = 218078876183040. Its totient is φ = 204329554248960.

The previous prime is 211202221202213. The next prime is 211202221202251. The reversal of 211202221202221 is 122202122202112.

211202221202221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211202221202221 - 2³ = 211202221202213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211202221202192 and 211202221202201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202221202251) 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, 1801962006 + ... + 1802079208.

It is an arithmetic number, because the mean of its divisors is an integer number (13629929761440).

Almost surely, 2^{211202221202221} is an apocalyptic number.

It is an amenable number.

211202221202221 is a deficient number, since it is larger than the sum of its proper divisors (6876654980819).

211202221202221 is a wasteful number, since it uses less digits than its factorization.

211202221202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133716.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211202221202221 its reverse (122202122202112), we get a palindrome (333404343404333).

The spelling of 211202221202221 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-one".