11333123231 has 16 divisors (see below), whose sum is σ = 11580247680. Its totient is φ = 11088554400.

The previous prime is 11333123227. The next prime is 11333123267. The reversal of 11333123231 is 13232133311.

It is a cyclic number.

It is not a de Polignac number, because 11333123231 - 2² = 11333123227 is a prime.

It is a super-2 number, since 2×11333123231² (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 = 11333123197 and 11333123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333120231) 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, 10782656 + ... + 10783706.

It is an arithmetic number, because the mean of its divisors is an integer number (723765480).

Almost surely, 2^11333123231 is an apocalyptic number.

11333123231 is a deficient number, since it is larger than the sum of its proper divisors (247124449).

11333123231 is a wasteful number, since it uses less digits than its factorization.

11333123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054.

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

Adding to 11333123231 its reverse (13232133311), we get a palindrome (24565256542).

The spelling of 11333123231 in words is "eleven billion, three hundred thirty-three million, one hundred twenty-three thousand, two hundred thirty-one".