12031101312 has 32 divisors (see below), whose sum is σ = 31957613880. Its totient is φ = 4010366976.

The previous prime is 12031101281. The next prime is 12031101319. The reversal of 12031101312 is 21310113021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 12031101291 and 12031101300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031101319) 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, 15665113 + ... + 15665880.

Almost surely, 2^12031101312 is an apocalyptic number.

12031101312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031101312 is an abundant number, since it is smaller than the sum of its proper divisors (19926512568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12031101312 is an equidigital number, since it uses as much as digits as its factorization.

12031101312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31331010 (or 31330998 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12031101312 its reverse (21310113021), we get a palindrome (33341214333).

The spelling of 12031101312 in words is "twelve billion, thirty-one million, one hundred one thousand, three hundred twelve".