1031330231221 has 8 divisors (see below), whose sum is σ = 1059235595264. Its totient is φ = 1003426529040.

The previous prime is 1031330231171. The next prime is 1031330231227. The reversal of 1031330231221 is 1221320331301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1031330231221 - 2¹⁷ = 1031330100149 is a prime.

It is a super-2 number, since 2×1031330231221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031330231192 and 1031330231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031330231227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897916 + ... + 1693786.

It is an arithmetic number, because the mean of its divisors is an integer number (132404449408).

Almost surely, 2^{1031330231221} is an apocalyptic number.

It is an amenable number.

1031330231221 is a deficient number, since it is larger than the sum of its proper divisors (27905364043).

1031330231221 is an equidigital number, since it uses as much as digits as its factorization.

1031330231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830931.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1031330231221 its reverse (1221320331301), we get a palindrome (2252650562522).

The spelling of 1031330231221 in words is "one trillion, thirty-one billion, three hundred thirty million, two hundred thirty-one thousand, two hundred twenty-one".