2111201020221 has 64 divisors (see below), whose sum is σ = 2971561807872. Its totient is φ = 1331674705152.

The previous prime is 2111201020217. The next prime is 2111201020273. The reversal of 2111201020221 is 1220201021112.

It is not a de Polignac number, because 2111201020221 - 2² = 2111201020217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111201020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111201020921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 695158515 + ... + 695161551.

It is an arithmetic number, because the mean of its divisors is an integer number (46430653248).

Almost surely, 2^{2111201020221} is an apocalyptic number.

It is an amenable number.

2111201020221 is a deficient number, since it is larger than the sum of its proper divisors (860360787651).

2111201020221 is a wasteful number, since it uses less digits than its factorization.

2111201020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2111201020221 its reverse (1220201021112), we get a palindrome (3331402041333).

The spelling of 2111201020221 in words is "two trillion, one hundred eleven billion, two hundred one million, twenty thousand, two hundred twenty-one".