11212211011 has 16 divisors (see below), whose sum is σ = 12113193600. Its totient is φ = 10345883328.

The previous prime is 11212211009. The next prime is 11212211029. The reversal of 11212211011 is 11011221211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11212211011 - 2¹ = 11212211009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212210982 and 11212211000.

It is not an unprimeable number, because it can be changed into a prime (11212211711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63816 + ... + 162778.

It is an arithmetic number, because the mean of its divisors is an integer number (757074600).

Almost surely, 2^11212211011 is an apocalyptic number.

11212211011 is a deficient number, since it is larger than the sum of its proper divisors (900982589).

11212211011 is an equidigital number, since it uses as much as digits as its factorization.

11212211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99138.

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

Adding to 11212211011 its reverse (11011221211), we get a palindrome (22223432222).

The spelling of 11212211011 in words is "eleven billion, two hundred twelve million, two hundred eleven thousand, eleven".