11121330231 has 48 divisors (see below), whose sum is σ = 18317145600. Its totient is φ = 6436330560.

The previous prime is 11121330217. The next prime is 11121330239. The reversal of 11121330231 is 13203312111.

It is not a de Polignac number, because 11121330231 - 2¹³ = 11121322039 is a prime.

It is a super-2 number, since 2×11121330231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121330239) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1469445 + ... + 1476993.

It is an arithmetic number, because the mean of its divisors is an integer number (381607200).

Almost surely, 2^11121330231 is an apocalyptic number.

11121330231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121330231 is a deficient number, since it is larger than the sum of its proper divisors (7195815369).

11121330231 is a wasteful number, since it uses less digits than its factorization.

11121330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8236 (or 8233 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11121330231 its reverse (13203312111), we get a palindrome (24324642342).

The spelling of 11121330231 in words is "eleven billion, one hundred twenty-one million, three hundred thirty thousand, two hundred thirty-one".