11131201211 has 4 divisors (see below), whose sum is σ = 11987447472. Its totient is φ = 10274954952.

The previous prime is 11131201201. The next prime is 11131201229. The reversal of 11131201211 is 11210213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11210213111 = 3119 ⋅3594169.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131201211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131201201) 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, 428123111 + ... + 428123136.

It is an arithmetic number, because the mean of its divisors is an integer number (2996861868).

Almost surely, 2^11131201211 is an apocalyptic number.

11131201211 is a deficient number, since it is larger than the sum of its proper divisors (856246261).

11131201211 is an equidigital number, since it uses as much as digits as its factorization.

11131201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856246260.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11131201211 its reverse (11210213111), we get a palindrome (22341414322).

The spelling of 11131201211 in words is "eleven billion, one hundred thirty-one million, two hundred one thousand, two hundred eleven".