211220221022211 has 16 divisors (see below), whose sum is σ = 282282090946560. Its totient is φ = 140485919832960.

The previous prime is 211220221022147. The next prime is 211220221022221. The reversal of 211220221022211 is 112220122022112.

It is not a de Polignac number, because 211220221022211 - 2⁶ = 211220221022147 is a prime.

It is a super-2 number, since 2×211220221022211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220221022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272343966 + ... + 273118428.

It is an arithmetic number, because the mean of its divisors is an integer number (17642630684160).

Almost surely, 2^{211220221022211} is an apocalyptic number.

211220221022211 is a deficient number, since it is larger than the sum of its proper divisors (71061869924349).

211220221022211 is a wasteful number, since it uses less digits than its factorization.

211220221022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985826.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211220221022211 its reverse (112220122022112), we get a palindrome (323440343044323).

Subtracting from 211220221022211 its reverse (112220122022112), we obtain a palindrome (99000099000099).

The spelling of 211220221022211 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twenty-one million, twenty-two thousand, two hundred eleven".