2021321331247 has 2 divisors, whose sum is σ = 2021321331248. Its totient is φ = 2021321331246.

The previous prime is 2021321331229. The next prime is 2021321331257. The reversal of 2021321331247 is 7421331231202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021321331247 - 2¹⁹ = 2021320806959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021321331257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010660665623 + 1010660665624.

It is an arithmetic number, because the mean of its divisors is an integer number (1010660665624).

Almost surely, 2^{2021321331247} is an apocalyptic number.

2021321331247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021321331247 is an equidigital number, since it uses as much as digits as its factorization.

2021321331247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 2021321331247 its reverse (7421331231202), we get a palindrome (9442652562449).

The spelling of 2021321331247 in words is "two trillion, twenty-one billion, three hundred twenty-one million, three hundred thirty-one thousand, two hundred forty-seven".