1000031230321 has 4 divisors (see below), whose sum is σ = 1001662603252. Its totient is φ = 998399857392.

The previous prime is 1000031230301. The next prime is 1000031230409. The reversal of 1000031230321 is 1230321300001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 479196217600 + 520835012721 = 692240^2 + 721689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000031230321 - 2⁹ = 1000031229809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000031230295 and 1000031230304.

It is not an unprimeable number, because it can be changed into a prime (1000031230301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815685546 + ... + 815686771.

It is an arithmetic number, because the mean of its divisors is an integer number (250415650813).

Almost surely, 2^{1000031230321} is an apocalyptic number.

It is an amenable number.

1000031230321 is a deficient number, since it is larger than the sum of its proper divisors (1631372931).

1000031230321 is an equidigital number, since it uses as much as digits as its factorization.

1000031230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631372930.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1000031230321 its reverse (1230321300001), we get a palindrome (2230352530322).

The spelling of 1000031230321 in words is "one trillion, thirty-one million, two hundred thirty thousand, three hundred twenty-one".