11201212211 has 4 divisors (see below), whose sum is σ = 12801385392. Its totient is φ = 9601039032.

The previous prime is 11201212193. The next prime is 11201212223. The reversal of 11201212211 is 11221210211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11221210211 = 43 ⋅260958377.

It is a cyclic number.

It is not a de Polignac number, because 11201212211 - 2²² = 11197017907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11201212111) 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, 800086580 + ... + 800086593.

It is an arithmetic number, because the mean of its divisors is an integer number (3200346348).

Almost surely, 2^11201212211 is an apocalyptic number.

11201212211 is a deficient number, since it is larger than the sum of its proper divisors (1600173181).

11201212211 is an equidigital number, since it uses as much as digits as its factorization.

11201212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600173180.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11201212211 its reverse (11221210211), we get a palindrome (22422422422).

The spelling of 11201212211 in words is "eleven billion, two hundred one million, two hundred twelve thousand, two hundred eleven".