3121211312 has 20 divisors (see below), whose sum is σ = 6060310776. Its totient is φ = 1557260160.

The previous prime is 3121211243. The next prime is 3121211341. The reversal of 3121211312 is 2131121213.

3121211312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3121211312² = 19483920108313522688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201389 + ... + 216332.

Almost surely, 2^3121211312 is an apocalyptic number.

It is an amenable number.

3121211312 is a deficient number, since it is larger than the sum of its proper divisors (2939099464).

3121211312 is a wasteful number, since it uses less digits than its factorization.

3121211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418196 (or 418190 counting only the distinct ones).

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

The square root of 3121211312 is about 55867.8021046112. The cubic root of 3121211312 is about 1461.4177933236.

Adding to 3121211312 its reverse (2131121213), we get a palindrome (5252332525).

Subtracting from 3121211312 its reverse (2131121213), we obtain a palindrome (990090099).

It can be divided in two parts, 31212 and 11312, that added together give a palindrome (42524).

The spelling of 3121211312 in words is "three billion, one hundred twenty-one million, two hundred eleven thousand, three hundred twelve".