12111000231 has 12 divisors (see below), whose sum is σ = 17749455416. Its totient is φ = 7339999920.

The previous prime is 12111000227. The next prime is 12111000241. The reversal of 12111000231 is 13200011121.

It is not a de Polignac number, because 12111000231 - 2² = 12111000227 is a prime.

It is a super-2 number, since 2×12111000231² (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 (12111000211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16681456 + ... + 16682181.

Almost surely, 2^12111000231 is an apocalyptic number.

12111000231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111000231 is a deficient number, since it is larger than the sum of its proper divisors (5638455185).

12111000231 is a wasteful number, since it uses less digits than its factorization.

12111000231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33363662 (or 33363651 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 12111000231 its reverse (13200011121), we get a palindrome (25311011352).

The spelling of 12111000231 in words is "twelve billion, one hundred eleven million, two hundred thirty-one", and thus it is an aban number.