211344123332021 has 2 divisors, whose sum is σ = 211344123332022. Its totient is φ = 211344123332020.

The previous prime is 211344123331997. The next prime is 211344123332099. The reversal of 211344123332021 is 120233321443112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205382175607921 + 5961947724100 = 14331161^2 + 2441710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211344123332021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211344123302021) 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, 105672061666010 + 105672061666011.

It is an arithmetic number, because the mean of its divisors is an integer number (105672061666011).

Almost surely, 2^{211344123332021} is an apocalyptic number.

It is an amenable number.

211344123332021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211344123332021 is an equidigital number, since it uses as much as digits as its factorization.

211344123332021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 211344123332021 its reverse (120233321443112), we get a palindrome (331577444775133).

The spelling of 211344123332021 in words is "two hundred eleven trillion, three hundred forty-four billion, one hundred twenty-three million, three hundred thirty-two thousand, twenty-one".