3121112312 has 16 divisors (see below), whose sum is σ = 5873844600. Its totient is φ = 1554753760.

The previous prime is 3121112303. The next prime is 3121112317. The reversal of 3121112312 is 2132111213.

It is a super-3 number, since 3×3121112312³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121112317) 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, 723014 + ... + 727317.

Almost surely, 2^3121112312 is an apocalyptic number.

It is an amenable number.

3121112312 is a deficient number, since it is larger than the sum of its proper divisors (2752732288).

3121112312 is a wasteful number, since it uses less digits than its factorization.

3121112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450606 (or 1450602 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 3121112312 is about 55866.9160774067. The cubic root of 3121112312 is about 1461.4023418555.

Adding to 3121112312 its reverse (2132111213), we get a palindrome (5253223525).

The spelling of 3121112312 in words is "three billion, one hundred twenty-one million, one hundred twelve thousand, three hundred twelve".