11331131222011 has 4 divisors (see below), whose sum is σ = 11354787028800. Its totient is φ = 11307475415224.

The previous prime is 11331131221903. The next prime is 11331131222051. The reversal of 11331131222011 is 11022213113311.

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 11331131222011 - 2²¹ = 11331129124859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331131222051) 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, 11827902676 + ... + 11827903633.

It is an arithmetic number, because the mean of its divisors is an integer number (2838696757200).

Almost surely, 2^{11331131222011} is an apocalyptic number.

11331131222011 is a deficient number, since it is larger than the sum of its proper divisors (23655806789).

11331131222011 is an equidigital number, since it uses as much as digits as its factorization.

11331131222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23655806788.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 11331131222011 its reverse (11022213113311), we get a palindrome (22353344335322).

The spelling of 11331131222011 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-two thousand, eleven".