11120311231 has 4 divisors (see below), whose sum is σ = 11121487272. Its totient is φ = 11119135192.

The previous prime is 11120311211. The next prime is 11120311247. The reversal of 11120311231 is 13211302111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11120311231 - 2³¹ = 8972827583 is a prime.

It is a super-2 number, since 2×11120311231² (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 (11120311211) 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, 573721 + ... + 592786.

It is an arithmetic number, because the mean of its divisors is an integer number (2780371818).

Almost surely, 2^11120311231 is an apocalyptic number.

11120311231 is a deficient number, since it is larger than the sum of its proper divisors (1176041).

11120311231 is an equidigital number, since it uses as much as digits as its factorization.

11120311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176040.

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

Adding to 11120311231 its reverse (13211302111), we get a palindrome (24331613342).

The spelling of 11120311231 in words is "eleven billion, one hundred twenty million, three hundred eleven thousand, two hundred thirty-one".