2012211120221 has 16 divisors (see below), whose sum is σ = 2187995477184. Its totient is φ = 1843124661504.

The previous prime is 2012211120191. The next prime is 2012211120277. The reversal of 2012211120221 is 1220211122102.

2012211120221 is nontrivially palindromic in base 4.

It is a cyclic number.

It is not a de Polignac number, because 2012211120221 - 2¹⁰ = 2012211119197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 2012211120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012211120421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4766255 + ... + 5171228.

It is an arithmetic number, because the mean of its divisors is an integer number (136749717324).

Almost surely, 2^{2012211120221} is an apocalyptic number.

It is an amenable number.

2012211120221 is a deficient number, since it is larger than the sum of its proper divisors (175784356963).

2012211120221 is a wasteful number, since it uses less digits than its factorization.

2012211120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937820.

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

Adding to 2012211120221 its reverse (1220211122102), we get a palindrome (3232422242323).

The spelling of 2012211120221 in words is "two trillion, twelve billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty-one".