210020320211021 has 2 divisors, whose sum is σ = 210020320211022. Its totient is φ = 210020320211020.

The previous prime is 210020320211011. The next prime is 210020320211029. The reversal of 210020320211021 is 120112023020012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199823244733225 + 10197075477796 = 14135885^2 + 3193286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210020320211021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210020320211029) 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 as a sum of consecutive naturals, namely, 105010160105510 + 105010160105511.

It is an arithmetic number, because the mean of its divisors is an integer number (105010160105511).

Almost surely, 2^{210020320211021} is an apocalyptic number.

It is an amenable number.

210020320211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020320211021 is an equidigital number, since it uses as much as digits as its factorization.

210020320211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 210020320211021 its reverse (120112023020012), we get a palindrome (330132343231033).

The spelling of 210020320211021 in words is "two hundred ten trillion, twenty billion, three hundred twenty million, two hundred eleven thousand, twenty-one".