12131133212 has 24 divisors (see below), whose sum is σ = 23193702000. Its totient is φ = 5505992960.

The previous prime is 12131133169. The next prime is 12131133229. The reversal of 12131133212 is 21233113121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173837 + ... + 233412.

It is an arithmetic number, because the mean of its divisors is an integer number (966404250).

Almost surely, 2^12131133212 is an apocalyptic number.

It is an amenable number.

12131133212 is a deficient number, since it is larger than the sum of its proper divisors (11062568788).

12131133212 is a wasteful number, since it uses less digits than its factorization.

12131133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407941 (or 407939 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 12131133212 its reverse (21233113121), we get a palindrome (33364246333).

The spelling of 12131133212 in words is "twelve billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred twelve".