211220203211 has 2 divisors, whose sum is σ = 211220203212. Its totient is φ = 211220203210.

The previous prime is 211220203189. The next prime is 211220203247. The reversal of 211220203211 is 112302022112.

211220203211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220203211 - 2⁶ = 211220203147 is a prime.

It is a super-2 number, since 2×211220203211² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211220203211.

It is not a weakly prime, because it can be changed into another prime (211220203511) 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, 105610101605 + 105610101606.

It is an arithmetic number, because the mean of its divisors is an integer number (105610101606).

Almost surely, 2^211220203211 is an apocalyptic number.

211220203211 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220203211 is an equidigital number, since it uses as much as digits as its factorization.

211220203211 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 211220203211 its reverse (112302022112), we get a palindrome (323522225323).

The spelling of 211220203211 in words is "two hundred eleven billion, two hundred twenty million, two hundred three thousand, two hundred eleven".