11101212211 has 12 divisors (see below), whose sum is σ = 11809081648. Its totient is φ = 10433630592.

The previous prime is 11101212181. The next prime is 11101212247. The reversal of 11101212211 is 11221210111.

It is a happy number.

It is not a de Polignac number, because 11101212211 - 2¹¹ = 11101210163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101212191 and 11101212200.

It is not an unprimeable number, because it can be changed into a prime (11101212271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183685 + ... + 236521.

Almost surely, 2^11101212211 is an apocalyptic number.

11101212211 is a deficient number, since it is larger than the sum of its proper divisors (707869437).

11101212211 is an equidigital number, since it uses as much as digits as its factorization.

11101212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53598 (or 53581 counting only the distinct ones).

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

Adding to 11101212211 its reverse (11221210111), we get a palindrome (22322422322).

The spelling of 11101212211 in words is "eleven billion, one hundred one million, two hundred twelve thousand, two hundred eleven".