211102211221 has 8 divisors (see below), whose sum is σ = 230296701600. Its totient is φ = 191908284240.

The previous prime is 211102211213. The next prime is 211102211263. The reversal of 211102211221 is 122112201112.

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

It is a cyclic number.

It is not a de Polignac number, because 211102211221 - 2³ = 211102211213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211102211195 and 211102211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102211321) 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 7 ways as a sum of consecutive naturals, for example, 1186590 + ... + 1352848.

It is an arithmetic number, because the mean of its divisors is an integer number (28787087700).

Almost surely, 2^211102211221 is an apocalyptic number.

It is an amenable number.

211102211221 is a deficient number, since it is larger than the sum of its proper divisors (19194490379).

211102211221 is a wasteful number, since it uses less digits than its factorization.

211102211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281699.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211102211221 its reverse (122112201112), we get a palindrome (333214412333).

The spelling of 211102211221 in words is "two hundred eleven billion, one hundred two million, two hundred eleven thousand, two hundred twenty-one".