2021321331229 has 2 divisors, whose sum is σ = 2021321331230. Its totient is φ = 2021321331228.

The previous prime is 2021321331181. The next prime is 2021321331247. The reversal of 2021321331229 is 9221331231202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2014597003225 + 6724328004 = 1419365^2 + 82002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021321331229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021321331229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021321331299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010660665614 + 1010660665615.

It is an arithmetic number, because the mean of its divisors is an integer number (1010660665615).

Almost surely, 2^{2021321331229} is an apocalyptic number.

It is an amenable number.

2021321331229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021321331229 is an equidigital number, since it uses as much as digits as its factorization.

2021321331229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 2021321331229 in words is "two trillion, twenty-one billion, three hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-nine".