11333231231 has 16 divisors (see below), whose sum is σ = 13257809664. Its totient is φ = 9485187264.

The previous prime is 11333231219. The next prime is 11333231251. The reversal of 11333231231 is 13213233311.

It is not a de Polignac number, because 11333231231 - 2¹⁴ = 11333214847 is a prime.

It is a super-2 number, since 2×11333231231² (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 = 11333231197 and 11333231206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333231251) 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, 1723556 + ... + 1730118.

It is an arithmetic number, because the mean of its divisors is an integer number (828613104).

Almost surely, 2^11333231231 is an apocalyptic number.

11333231231 is a deficient number, since it is larger than the sum of its proper divisors (1924578433).

11333231231 is an equidigital number, since it uses as much as digits as its factorization.

11333231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350.

The product of its digits is 972, while the sum is 23.

Adding to 11333231231 its reverse (13213233311), we get a palindrome (24546464542).

The spelling of 11333231231 in words is "eleven billion, three hundred thirty-three million, two hundred thirty-one thousand, two hundred thirty-one".