1321330031 has 6 divisors (see below), whose sum is σ = 1537057440. Its totient is φ = 1132568556.

The previous prime is 1321330009. The next prime is 1321330033. The reversal of 1321330031 is 1300331231.

It is not a de Polignac number, because 1321330031 - 2¹⁴ = 1321313647 is a prime.

It is a super-2 number, since 2×1321330031² = 3491826101644921922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321329991 and 1321330009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321330033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13482911 + ... + 13483008.

It is an arithmetic number, because the mean of its divisors is an integer number (256176240).

Almost surely, 2^1321330031 is an apocalyptic number.

1321330031 is a deficient number, since it is larger than the sum of its proper divisors (215727409).

1321330031 is an equidigital number, since it uses as much as digits as its factorization.

1321330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26965933 (or 26965926 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1321330031 is about 36350.1035899487. The cubic root of 1321330031 is about 1097.3296192735.

Adding to 1321330031 its reverse (1300331231), we get a palindrome (2621661262).

The spelling of 1321330031 in words is "one billion, three hundred twenty-one million, three hundred thirty thousand, thirty-one".