211204033409 has 2 divisors, whose sum is σ = 211204033410. Its totient is φ = 211204033408.

The previous prime is 211204033349. The next prime is 211204033423. The reversal of 211204033409 is 904330402112.

211204033409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197911096384 + 13292937025 = 444872^2 + 115295^2 .

It is a cyclic number.

It is not a de Polignac number, because 211204033409 - 2⁸ = 211204033153 is a prime.

It is a super-2 number, since 2×211204033409² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211204033309) 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, 105602016704 + 105602016705.

It is an arithmetic number, because the mean of its divisors is an integer number (105602016705).

Almost surely, 2^211204033409 is an apocalyptic number.

It is an amenable number.

211204033409 is a deficient number, since it is larger than the sum of its proper divisors (1).

211204033409 is an equidigital number, since it uses as much as digits as its factorization.

211204033409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 211204033409 in words is "two hundred eleven billion, two hundred four million, thirty-three thousand, four hundred nine".