3121103560 has 128 divisors (see below), whose sum is σ = 7424409600. Its totient is φ = 1179360000.

The previous prime is 3121103551. The next prime is 3121103561. The reversal of 3121103560 is 653011213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3121103561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14791855 + ... + 14792065.

It is an arithmetic number, because the mean of its divisors is an integer number (58003200).

Almost surely, 2^3121103560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121103560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3712204800).

3121103560 is an abundant number, since it is smaller than the sum of its proper divisors (4303306040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121103560 is a wasteful number, since it uses less digits than its factorization.

3121103560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 3121103560 is about 55866.8377483458. The cubic root of 3121103560 is about 1461.4009758676.

Adding to 3121103560 its reverse (653011213), we get a palindrome (3774114773).

The spelling of 3121103560 in words is "three billion, one hundred twenty-one million, one hundred three thousand, five hundred sixty".