11011212201211 has 4 divisors (see below), whose sum is σ = 11011227834024. Its totient is φ = 11011196568400.

The previous prime is 11011212201203. The next prime is 11011212201217. The reversal of 11011212201211 is 11210221211011.

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 11011212201211 - 2³ = 11011212201203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011212201217) 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, 6707410 + ... + 8186071.

It is an arithmetic number, because the mean of its divisors is an integer number (2752806958506).

Almost surely, 2^{11011212201211} is an apocalyptic number.

11011212201211 is a deficient number, since it is larger than the sum of its proper divisors (15632813).

11011212201211 is an equidigital number, since it uses as much as digits as its factorization.

11011212201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15632812.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11011212201211 its reverse (11210221211011), we get a palindrome (22221433412222).

The spelling of 11011212201211 in words is "eleven trillion, eleven billion, two hundred twelve million, two hundred one thousand, two hundred eleven".