2012210112221 has 4 divisors (see below), whose sum is σ = 2031746132832. Its totient is φ = 1992674091612.

The previous prime is 2012210112193. The next prime is 2012210112271. The reversal of 2012210112221 is 1222110122102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-2012210112221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012210112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012210112271) 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 3 ways as a sum of consecutive naturals, for example, 9768010151 + ... + 9768010356.

It is an arithmetic number, because the mean of its divisors is an integer number (507936533208).

Almost surely, 2^{2012210112221} is an apocalyptic number.

It is an amenable number.

2012210112221 is a deficient number, since it is larger than the sum of its proper divisors (19536020611).

2012210112221 is a wasteful number, since it uses less digits than its factorization.

2012210112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19536020610.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2012210112221 its reverse (1222110122102), we get a palindrome (3234320234323).

The spelling of 2012210112221 in words is "two trillion, twelve billion, two hundred ten million, one hundred twelve thousand, two hundred twenty-one".