3121131330 has 96 divisors (see below), whose sum is σ = 8607867840. Its totient is φ = 782421120.

The previous prime is 3121131301. The next prime is 3121131341. The reversal of 3121131330 is 331311213.

It is a happy number.

3121131330 is a `hidden beast` number, since 312 + 11 + 313 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217044 + ... + 230976.

It is an arithmetic number, because the mean of its divisors is an integer number (89665290).

Almost surely, 2^3121131330 is an apocalyptic number.

3121131330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121131330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4303933920).

3121131330 is an abundant number, since it is smaller than the sum of its proper divisors (5486736510).

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

3121131330 is a wasteful number, since it uses less digits than its factorization.

3121131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14096 (or 14093 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3121131330 is about 55867.0862852181. The cubic root of 3121131330 is about 1461.4053101235.

Adding to 3121131330 its reverse (331311213), we get a palindrome (3452442543).

The spelling of 3121131330 in words is "three billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty".