2120011020221 has 4 divisors (see below), whose sum is σ = 2141001228444. Its totient is φ = 2099020812000.

The previous prime is 2120011020191. The next prime is 2120011020233. The reversal of 2120011020221 is 1220201100212.

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 1046404197721 + 1073606822500 = 1022939^2 + 1036150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120011020221 - 2⁶ = 2120011020157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120011020196 and 2120011020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120011020121) 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, 10495103960 + ... + 10495104161.

It is an arithmetic number, because the mean of its divisors is an integer number (535250307111).

Almost surely, 2^{2120011020221} is an apocalyptic number.

It is an amenable number.

2120011020221 is a deficient number, since it is larger than the sum of its proper divisors (20990208223).

2120011020221 is a wasteful number, since it uses less digits than its factorization.

2120011020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20990208222.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2120011020221 its reverse (1220201100212), we get a palindrome (3340212120433).

The spelling of 2120011020221 in words is "two trillion, one hundred twenty billion, eleven million, twenty thousand, two hundred twenty-one".