3121231112 has 8 divisors (see below), whose sum is σ = 5852308350. Its totient is φ = 1560615552.

The previous prime is 3121231081. The next prime is 3121231117. The reversal of 3121231112 is 2111321213.

It can be written as a sum of positive squares in only one way, i.e., 2152403236 + 968827876 = 46394^2 + 31126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (3121231117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195076937 + ... + 195076952.

Almost surely, 2^3121231112 is an apocalyptic number.

It is an amenable number.

3121231112 is a deficient number, since it is larger than the sum of its proper divisors (2731077238).

3121231112 is a wasteful number, since it uses less digits than its factorization.

3121231112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390153895 (or 390153891 counting only the distinct ones).

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

The square root of 3121231112 is about 55867.9793083659. The cubic root of 3121231112 is about 1461.4208835781.

Adding to 3121231112 its reverse (2111321213), we get a palindrome (5232552325).

The spelling of 3121231112 in words is "three billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred twelve".