2120211100221 has 12 divisors (see below), whose sum is σ = 3003021028992. Its totient is φ = 1330328532928.

The previous prime is 2120211100213. The next prime is 2120211100237. The reversal of 2120211100221 is 1220011120212.

It is not a de Polignac number, because 2120211100221 - 2³ = 2120211100213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120211100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211100201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1222727565 + ... + 1222729298.

It is an arithmetic number, because the mean of its divisors is an integer number (250251752416).

Almost surely, 2^{2120211100221} is an apocalyptic number.

It is an amenable number.

2120211100221 is a deficient number, since it is larger than the sum of its proper divisors (882809928771).

2120211100221 is a wasteful number, since it uses less digits than its factorization.

2120211100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445456900 (or 2445456883 counting only the distinct ones).

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

Adding to 2120211100221 its reverse (1220011120212), we get a palindrome (3340222220433).

The spelling of 2120211100221 in words is "two trillion, one hundred twenty billion, two hundred eleven million, one hundred thousand, two hundred twenty-one".