2021331422321 has 4 divisors (see below), whose sum is σ = 2024475017712. Its totient is φ = 2018187826932.

The previous prime is 2021331422291. The next prime is 2021331422323. The reversal of 2021331422321 is 1232241331202.

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 a cyclic number.

It is not a de Polignac number, because 2021331422321 - 2²⁶ = 2021264313457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021331422323) 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, 1571796731 + ... + 1571798016.

It is an arithmetic number, because the mean of its divisors is an integer number (506118754428).

Almost surely, 2^{2021331422321} is an apocalyptic number.

It is an amenable number.

2021331422321 is a deficient number, since it is larger than the sum of its proper divisors (3143595391).

2021331422321 is an equidigital number, since it uses as much as digits as its factorization.

2021331422321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143595390.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 2021331422321 its reverse (1232241331202), we get a palindrome (3253572753523).

The spelling of 2021331422321 in words is "two trillion, twenty-one billion, three hundred thirty-one million, four hundred twenty-two thousand, three hundred twenty-one".