2121112020211 has 4 divisors (see below), whose sum is σ = 2142113129424. Its totient is φ = 2100110911000.

The previous prime is 2121112020191. The next prime is 2121112020217. The reversal of 2121112020211 is 1120202111212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121112020211 - 2¹¹ = 2121112018163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121112020217) 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, 10500554455 + ... + 10500554656.

It is an arithmetic number, because the mean of its divisors is an integer number (535528282356).

Almost surely, 2^{2121112020211} is an apocalyptic number.

2121112020211 is a deficient number, since it is larger than the sum of its proper divisors (21001109213).

2121112020211 is a wasteful number, since it uses less digits than its factorization.

2121112020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21001109212.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2121112020211 its reverse (1120202111212), we get a palindrome (3241314131423).

It can be divided in two parts, 212111 and 2020211, that added together give a palindrome (2232322).

The spelling of 2121112020211 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, twenty thousand, two hundred eleven".