11011312231 has 8 divisors (see below), whose sum is σ = 11873559600. Its totient is φ = 10177335360.

The previous prime is 11011312211. The next prime is 11011312237. The reversal of 11011312231 is 13221311011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11011312231 - 2⁹ = 11011311719 is a prime.

It is a super-2 number, since 2×11011312231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011312237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7066816 + ... + 7068373.

It is an arithmetic number, because the mean of its divisors is an integer number (1484194950).

Almost surely, 2^11011312231 is an apocalyptic number.

11011312231 is a deficient number, since it is larger than the sum of its proper divisors (862247369).

11011312231 is a wasteful number, since it uses less digits than its factorization.

11011312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14135249.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11011312231 its reverse (13221311011), we get a palindrome (24232623242).

The spelling of 11011312231 in words is "eleven billion, eleven million, three hundred twelve thousand, two hundred thirty-one".