2120211333221 has 4 divisors (see below), whose sum is σ = 2135687328492. Its totient is φ = 2104735337952.

The previous prime is 2120211333203. The next prime is 2120211333269. The reversal of 2120211333221 is 1223331120212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 777243244996 + 1342968088225 = 881614^2 + 1158865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120211333221 - 2¹⁴ = 2120211316837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211330221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7737997430 + ... + 7737997703.

It is an arithmetic number, because the mean of its divisors is an integer number (533921832123).

Almost surely, 2^{2120211333221} is an apocalyptic number.

It is an amenable number.

2120211333221 is a deficient number, since it is larger than the sum of its proper divisors (15475995271).

2120211333221 is a wasteful number, since it uses less digits than its factorization.

2120211333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15475995270.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2120211333221 its reverse (1223331120212), we get a palindrome (3343542453433).

The spelling of 2120211333221 in words is "two trillion, one hundred twenty billion, two hundred eleven million, three hundred thirty-three thousand, two hundred twenty-one".