211220102211 has 4 divisors (see below), whose sum is σ = 281626802952. Its totient is φ = 140813401472.

The previous prime is 211220102189. The next prime is 211220102239. The reversal of 211220102211 is 112201022112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211220102211 - 2⁵ = 211220102179 is a prime.

It is a super-2 number, since 2×211220102211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220100211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35203350366 + ... + 35203350371.

It is an arithmetic number, because the mean of its divisors is an integer number (70406700738).

Almost surely, 2^211220102211 is an apocalyptic number.

211220102211 is a deficient number, since it is larger than the sum of its proper divisors (70406700741).

211220102211 is an equidigital number, since it uses as much as digits as its factorization.

211220102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70406700740.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211220102211 its reverse (112201022112), we get a palindrome (323421124323).

It can be divided in two parts, 2 and 11220102211, that multiplied together give a palindrome (22440204422).

The spelling of 211220102211 in words is "two hundred eleven billion, two hundred twenty million, one hundred two thousand, two hundred eleven".