2031120321 has 16 divisors (see below), whose sum is σ = 2723448000. Its totient is φ = 1346459328.

The previous prime is 2031120319. The next prime is 2031120397. The reversal of 2031120321 is 1230211302.

It is not a de Polignac number, because 2031120321 - 2¹ = 2031120319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2031120321.

It is not an unprimeable number, because it can be changed into a prime (2031122321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404790 + ... + 409776.

It is an arithmetic number, because the mean of its divisors is an integer number (170215500).

Almost surely, 2^2031120321 is an apocalyptic number.

It is an amenable number.

2031120321 is a deficient number, since it is larger than the sum of its proper divisors (692327679).

2031120321 is a wasteful number, since it uses less digits than its factorization.

2031120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2031120321 is about 45067.9522610025. The cubic root of 2031120321 is about 1266.4223033302.

Adding to 2031120321 its reverse (1230211302), we get a palindrome (3261331623).

The spelling of 2031120321 in words is "two billion, thirty-one million, one hundred twenty thousand, three hundred twenty-one".