11133213131 has 4 divisors (see below), whose sum is σ = 11133541152. Its totient is φ = 11132885112.

The previous prime is 11133213101. The next prime is 11133213139. The reversal of 11133213131 is 13131233111.

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 11133213131 - 2¹⁴ = 11133196747 is a prime.

It is a super-2 number, since 2×11133213131² (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 (11133213139) 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, 106340 + ... + 183233.

It is an arithmetic number, because the mean of its divisors is an integer number (2783385288).

Almost surely, 2^11133213131 is an apocalyptic number.

11133213131 is a deficient number, since it is larger than the sum of its proper divisors (328021).

11133213131 is an equidigital number, since it uses as much as digits as its factorization.

11133213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328020.

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

Adding to 11133213131 its reverse (13131233111), we get a palindrome (24264446242).

The spelling of 11133213131 in words is "eleven billion, one hundred thirty-three million, two hundred thirteen thousand, one hundred thirty-one".