3121300000 has 360 divisors, whose sum is σ = 9649702692. Its totient is φ = 987840000.

The previous prime is 3121299991. The next prime is 3121300037. The reversal of 3121300000 is 31213.

It can be written as a sum of positive squares in 6 ways, for example, as 852873616 + 2268426384 = 29204^2 + 47628^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 3121300000.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 240099994 + ... + 240100006.

Almost surely, 2^3121300000 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 3121300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4824851346).

3121300000 is an abundant number, since it is smaller than the sum of its proper divisors (6528402692).

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

3121300000 is an frugal number, since it uses more digits than its factorization.

3121300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 3121300000 is about 55868.5958298578. The cubic root of 3121300000 is about 1461.4316350644.

Adding to 3121300000 its reverse (31213), we get a palindrome (3121331213).

3121300000 divided by its reverse (31213) gives a 5-th power (100000 = 10⁵).

The spelling of 3121300000 in words is "three billion, one hundred twenty-one million, three hundred thousand".