11133321231 has 4 divisors (see below), whose sum is σ = 14844428312. Its totient is φ = 7422214152.

The previous prime is 11133321229. The next prime is 11133321239. The reversal of 11133321231 is 13212333111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13212333111 = 3 ⋅4404111037.

It is not a de Polignac number, because 11133321231 - 2¹ = 11133321229 is a prime.

It is a super-2 number, since 2×11133321231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11133321198 and 11133321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133321239) 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, 1855553536 + ... + 1855553541.

It is an arithmetic number, because the mean of its divisors is an integer number (3711107078).

Almost surely, 2^11133321231 is an apocalyptic number.

11133321231 is a deficient number, since it is larger than the sum of its proper divisors (3711107081).

11133321231 is an equidigital number, since it uses as much as digits as its factorization.

11133321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711107080.

The product of its digits is 324, while the sum is 21.

Adding to 11133321231 its reverse (13212333111), we get a palindrome (24345654342).

The spelling of 11133321231 in words is "eleven billion, one hundred thirty-three million, three hundred twenty-one thousand, two hundred thirty-one".