12031111424 has 18 divisors (see below), whose sum is σ = 24015226830. Its totient is φ = 6015555584.

The previous prime is 12031111373. The next prime is 12031111441. The reversal of 12031111424 is 42411113021.

It can be written as a sum of positive squares in only one way, i.e., 6259974400 + 5771137024 = 79120^2 + 75968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12031111396 and 12031111405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23498009 + ... + 23498520.

Almost surely, 2^12031111424 is an apocalyptic number.

It is an amenable number.

12031111424 is a deficient number, since it is larger than the sum of its proper divisors (11984115406).

12031111424 is an frugal number, since it uses more digits than its factorization.

12031111424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46996545 (or 46996531 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12031111424 its reverse (42411113021), we get a palindrome (54442224445).

The spelling of 12031111424 in words is "twelve billion, thirty-one million, one hundred eleven thousand, four hundred twenty-four".