2120220320021 has 32 divisors (see below), whose sum is σ = 2283927360000. Its totient is φ = 1962312168960.

The previous prime is 2120220319991. The next prime is 2120220320087. The reversal of 2120220320021 is 1200230220212.

It is a de Polignac number, because none of the positive numbers 2^k-2120220320021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120220320821) 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 31 ways as a sum of consecutive naturals, for example, 124497935 + ... + 124514963.

It is an arithmetic number, because the mean of its divisors is an integer number (71372730000).

Almost surely, 2^{2120220320021} is an apocalyptic number.

It is an amenable number.

2120220320021 is a deficient number, since it is larger than the sum of its proper divisors (163707039979).

2120220320021 is a wasteful number, since it uses less digits than its factorization.

2120220320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17997.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2120220320021 its reverse (1200230220212), we get a palindrome (3320450540233).

The spelling of 2120220320021 in words is "two trillion, one hundred twenty billion, two hundred twenty million, three hundred twenty thousand, twenty-one".