11213331131 has 4 divisors (see below), whose sum is σ = 11214931200. Its totient is φ = 11211731064.

The previous prime is 11213331127. The next prime is 11213331169. The reversal of 11213331131 is 13113331211.

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 11213331131 - 2² = 11213331127 is a prime.

It is a super-2 number, since 2×11213331131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213331931) 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, 789476 + ... + 803553.

It is an arithmetic number, because the mean of its divisors is an integer number (2803732800).

Almost surely, 2^11213331131 is an apocalyptic number.

11213331131 is a deficient number, since it is larger than the sum of its proper divisors (1600069).

11213331131 is an equidigital number, since it uses as much as digits as its factorization.

11213331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600068.

The product of its digits is 162, while the sum is 20.

Adding to 11213331131 its reverse (13113331211), we get a palindrome (24326662342).

The spelling of 11213331131 in words is "eleven billion, two hundred thirteen million, three hundred thirty-one thousand, one hundred thirty-one".