212012110222221 has 128 divisors (see below), whose sum is σ = 312147133849600. Its totient is φ = 127520452604160.

The previous prime is 212012110222193. The next prime is 212012110222223. The reversal of 212012110222221 is 122222011210212.

It is not a de Polignac number, because 212012110222221 - 2⁵ = 212012110222189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012110222223) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19170996390 + ... + 19171007448.

It is an arithmetic number, because the mean of its divisors is an integer number (2438649483200).

Almost surely, 2^{212012110222221} is an apocalyptic number.

It is an amenable number.

212012110222221 is a deficient number, since it is larger than the sum of its proper divisors (100135023627379).

212012110222221 is a wasteful number, since it uses less digits than its factorization.

212012110222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12039.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212012110222221 its reverse (122222011210212), we get a palindrome (334234121432433).

The spelling of 212012110222221 in words is "two hundred twelve trillion, twelve billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".