221010212220211 has 4 divisors (see below), whose sum is σ = 221010241968400. Its totient is φ = 221010182472024.

The previous prime is 221010212220169. The next prime is 221010212220223. The reversal of 221010212220211 is 112022212010122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221010212220211 - 2²⁹ = 221009675349299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010212220241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6720085 + ... + 22072153.

It is an arithmetic number, because the mean of its divisors is an integer number (55252560492100).

Almost surely, 2^{221010212220211} is an apocalyptic number.

221010212220211 is a deficient number, since it is larger than the sum of its proper divisors (29748189).

221010212220211 is a wasteful number, since it uses less digits than its factorization.

221010212220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29748188.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221010212220211 its reverse (112022212010122), we get a palindrome (333032424230333).

The spelling of 221010212220211 in words is "two hundred twenty-one trillion, ten billion, two hundred twelve million, two hundred twenty thousand, two hundred eleven".