11311120231 has 8 divisors (see below), whose sum is σ = 11523222144. Its totient is φ = 11100823800.

The previous prime is 11311120207. The next prime is 11311120243. The reversal of 11311120231 is 13202111311.

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 11311120231 - 2⁷ = 11311120103 is a prime.

It is a super-2 number, since 2×11311120231² (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 (11311120031) 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, 438721 + ... + 463786.

It is an arithmetic number, because the mean of its divisors is an integer number (1440402768).

Almost surely, 2^11311120231 is an apocalyptic number.

11311120231 is a deficient number, since it is larger than the sum of its proper divisors (212101913).

11311120231 is an equidigital number, since it uses as much as digits as its factorization.

11311120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902741.

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

Adding to 11311120231 its reverse (13202111311), we get a palindrome (24513231542).

The spelling of 11311120231 in words is "eleven billion, three hundred eleven million, one hundred twenty thousand, two hundred thirty-one".