2012210211221 has 16 divisors (see below), whose sum is σ = 2305057693440. Its totient is φ = 1720712004480.

The previous prime is 2012210211169. The next prime is 2012210211227. The reversal of 2012210211221 is 1221120122102.

It is not a de Polignac number, because 2012210211221 - 2²⁶ = 2012143102357 is a prime.

It is a super-2 number, since 2×2012210211221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012210211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012210211227) 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 15 ways as a sum of consecutive naturals, for example, 11946731 + ... + 12113991.

It is an arithmetic number, because the mean of its divisors is an integer number (144066105840).

Almost surely, 2^{2012210211221} is an apocalyptic number.

It is an amenable number.

2012210211221 is a deficient number, since it is larger than the sum of its proper divisors (292847482219).

2012210211221 is a wasteful number, since it uses less digits than its factorization.

2012210211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171284.

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

Adding to 2012210211221 its reverse (1221120122102), we get a palindrome (3233330333323).

The spelling of 2012210211221 in words is "two trillion, twelve billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".