3121312103 has 48 divisors (see below), whose sum is σ = 3992579136. Its totient is φ = 2418232320.

The previous prime is 3121312067. The next prime is 3121312123. The reversal of 3121312103 is 3012131213.

It is not a de Polignac number, because 3121312103 - 2¹² = 3121308007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121312123) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 7413833 + ... + 7414253.

It is an arithmetic number, because the mean of its divisors is an integer number (83178732).

Almost surely, 2^3121312103 is an apocalyptic number.

3121312103 is a deficient number, since it is larger than the sum of its proper divisors (871267033).

3121312103 is a wasteful number, since it uses less digits than its factorization.

3121312103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 3121312103 is about 55868.7041464181. The cubic root of 3121312103 is about 1461.4335239872.

Adding to 3121312103 its reverse (3012131213), we get a palindrome (6133443316).

It can be divided in two parts, 312131210 and 3, that added together give a palindrome (312131213).

The spelling of 3121312103 in words is "three billion, one hundred twenty-one million, three hundred twelve thousand, one hundred three".