3131111212 has 12 divisors (see below), whose sum is σ = 5569272016. Its totient is φ = 1539890640.

The previous prime is 3131111183. The next prime is 3131111227. The reversal of 3131111212 is 2121111313.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6415968 + ... + 6416455.

Almost surely, 2^3131111212 is an apocalyptic number.

It is an amenable number.

3131111212 is a deficient number, since it is larger than the sum of its proper divisors (2438160804).

3131111212 is a wasteful number, since it uses less digits than its factorization.

3131111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832488 (or 12832486 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 3131111212 is about 55956.3330821454. Note that the first 3 decimals coincide. The cubic root of 3131111212 is about 1462.9612774587.

Adding to 3131111212 its reverse (2121111313), we get a palindrome (5252222525).

The spelling of 3131111212 in words is "three billion, one hundred thirty-one million, one hundred eleven thousand, two hundred twelve".