211220220211 has 24 divisors (see below), whose sum is σ = 288660610224. Its totient is φ = 151926626880.

The previous prime is 211220220203. The next prime is 211220220227. The reversal of 211220220211 is 112022022112.

It is a happy number.

211220220211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211220220211 - 2³ = 211220220203 is a prime.

It is a super-2 number, since 2×211220220211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220220241) 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 in 23 ways as a sum of consecutive naturals, for example, 15065080 + ... + 15079093.

It is an arithmetic number, because the mean of its divisors is an integer number (12027525426).

Almost surely, 2^211220220211 is an apocalyptic number.

211220220211 is a deficient number, since it is larger than the sum of its proper divisors (77440390013).

211220220211 is a wasteful number, since it uses less digits than its factorization.

211220220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30144211 (or 30144204 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211220220211 its reverse (112022022112), we get a palindrome (323242242323).

The spelling of 211220220211 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty thousand, two hundred eleven".