11131223203211 has 16 divisors (see below), whose sum is σ = 11872374140736. Its totient is φ = 10399673711616.

The previous prime is 11131223203193. The next prime is 11131223203229. The reversal of 11131223203211 is 11230232213111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11131223203193) and next prime (11131223203229).

It is not a de Polignac number, because 11131223203211 - 2²⁶ = 11131156094347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131223203231) 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, 153018530 + ... + 153091256.

It is an arithmetic number, because the mean of its divisors is an integer number (742023383796).

Almost surely, 2^{11131223203211} is an apocalyptic number.

11131223203211 is a deficient number, since it is larger than the sum of its proper divisors (741150937525).

11131223203211 is a wasteful number, since it uses less digits than its factorization.

11131223203211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138598.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11131223203211 its reverse (11230232213111), we get a palindrome (22361455416322).

The spelling of 11131223203211 in words is "eleven trillion, one hundred thirty-one billion, two hundred twenty-three million, two hundred three thousand, two hundred eleven".