1020031321 has 16 divisors (see below), whose sum is σ = 1090195200. Its totient is φ = 951626448.

The previous prime is 1020031303. The next prime is 1020031357. The reversal of 1020031321 is 1231300201.

It is a cyclic number.

It is not a de Polignac number, because 1020031321 - 2⁵ = 1020031289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020031391) 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, 362506 + ... + 365308.

It is an arithmetic number, because the mean of its divisors is an integer number (68137200).

Almost surely, 2^1020031321 is an apocalyptic number.

It is an amenable number.

1020031321 is a deficient number, since it is larger than the sum of its proper divisors (70163879).

1020031321 is a wasteful number, since it uses less digits than its factorization.

1020031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1020031321 is about 31937.9291908539. The cubic root of 1020031321 is about 1006.6330128631.

Adding to 1020031321 its reverse (1231300201), we get a palindrome (2251331522).

The spelling of 1020031321 in words is "one billion, twenty million, thirty-one thousand, three hundred twenty-one".