211302121021969 has 2 divisors, whose sum is σ = 211302121021970. Its totient is φ = 211302121021968.

The previous prime is 211302121021939. The next prime is 211302121022033. The reversal of 211302121021969 is 969120121203112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198069172427025 + 13232948594944 = 14073705^2 + 3637712^2 .

It is a cyclic number.

It is not a de Polignac number, because 211302121021969 - 2⁷ = 211302121021841 is a prime.

It is a super-2 number, since 2×211302121021969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211302121021939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105651060510984 + 105651060510985.

It is an arithmetic number, because the mean of its divisors is an integer number (105651060510985).

Almost surely, 2^{211302121021969} is an apocalyptic number.

It is an amenable number.

211302121021969 is a deficient number, since it is larger than the sum of its proper divisors (1).

211302121021969 is an equidigital number, since it uses as much as digits as its factorization.

211302121021969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 211302121021969 in words is "two hundred eleven trillion, three hundred two billion, one hundred twenty-one million, twenty-one thousand, nine hundred sixty-nine".