2031221330 has 16 divisors (see below), whose sum is σ = 3688556184. Its totient is φ = 805297920.

The previous prime is 2031221329. The next prime is 2031221351. The reversal of 2031221330 is 331221302.

It can be written as a sum of positive squares in 4 ways, for example, as 1036260481 + 994960849 = 32191^2 + 31543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2031221299 and 2031221308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897641 + ... + 899900.

Almost surely, 2^2031221330 is an apocalyptic number.

2031221330 is a deficient number, since it is larger than the sum of its proper divisors (1657334854).

2031221330 is a wasteful number, since it uses less digits than its factorization.

2031221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797661.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2031221330 is about 45069.0728770850. The cubic root of 2031221330 is about 1266.4432963308.

Adding to 2031221330 its reverse (331221302), we get a palindrome (2362442632).

The spelling of 2031221330 in words is "two billion, thirty-one million, two hundred twenty-one thousand, three hundred thirty".