211100121211 has 6 divisors (see below), whose sum is σ = 245565447180. Its totient is φ = 180942960996.

The previous prime is 211100121209. The next prime is 211100121241. The reversal of 211100121211 is 112121001112.

It is a happy number.

It is not a de Polignac number, because 211100121211 - 2¹ = 211100121209 is a prime.

It is a super-2 number, since 2×211100121211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211100121191 and 211100121200.

It is not an unprimeable number, because it can be changed into a prime (211100121241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2154082821 + ... + 2154082918.

It is an arithmetic number, because the mean of its divisors is an integer number (40927574530).

Almost surely, 2^211100121211 is an apocalyptic number.

211100121211 is a deficient number, since it is larger than the sum of its proper divisors (34465325969).

211100121211 is an equidigital number, since it uses as much as digits as its factorization.

211100121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308165753 (or 4308165746 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211100121211 its reverse (112121001112), we get a palindrome (323221122323).

The spelling of 211100121211 in words is "two hundred eleven billion, one hundred million, one hundred twenty-one thousand, two hundred eleven".