2120313330021 has 4 divisors (see below), whose sum is σ = 2827084440032. Its totient is φ = 1413542220012.

The previous prime is 2120313329969. The next prime is 2120313330077. The reversal of 2120313330021 is 1200333130212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2120313330021 - 2¹⁰ = 2120313328997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120313330021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120313331021) 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 3 ways as a sum of consecutive naturals, for example, 353385555001 + ... + 353385555006.

It is an arithmetic number, because the mean of its divisors is an integer number (706771110008).

Almost surely, 2^{2120313330021} is an apocalyptic number.

It is an amenable number.

2120313330021 is a deficient number, since it is larger than the sum of its proper divisors (706771110011).

2120313330021 is an equidigital number, since it uses as much as digits as its factorization.

2120313330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706771110010.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 2120313330021 its reverse (1200333130212), we get a palindrome (3320646460233).

The spelling of 2120313330021 in words is "two trillion, one hundred twenty billion, three hundred thirteen million, three hundred thirty thousand, twenty-one".