3121151120 has 20 divisors (see below), whose sum is σ = 7256676540. Its totient is φ = 1248460416.

The previous prime is 3121151119. The next prime is 3121151123. The reversal of 3121151120 is 211511213.

It can be written as a sum of positive squares in 2 ways, for example, as 329930896 + 2791220224 = 18164^2 + 52832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (3121151123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19507115 + ... + 19507274.

It is an arithmetic number, because the mean of its divisors is an integer number (362833827).

Almost surely, 2^3121151120 is an apocalyptic number.

It is an amenable number.

3121151120 is an abundant number, since it is smaller than the sum of its proper divisors (4135525420).

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

3121151120 is a wasteful number, since it uses less digits than its factorization.

3121151120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39014402 (or 39014396 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 3121151120 is about 55867.2634017454. The cubic root of 3121151120 is about 1461.4083988700.

Adding to 3121151120 its reverse (211511213), we get a palindrome (3332662333).

The spelling of 3121151120 in words is "three billion, one hundred twenty-one million, one hundred fifty-one thousand, one hundred twenty".