1321230231 has 8 divisors (see below), whose sum is σ = 1957378160. Its totient is φ = 880820136.

The previous prime is 1321230221. The next prime is 1321230263. The reversal of 1321230231 is 1320321231.

It is not a de Polignac number, because 1321230231 - 2²³ = 1312841623 is a prime.

It is a super-2 number, since 2×1321230231² = 3491298646616626722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321230221) 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, 24467200 + ... + 24467253.

It is an arithmetic number, because the mean of its divisors is an integer number (244672270).

Almost surely, 2^1321230231 is an apocalyptic number.

1321230231 is a deficient number, since it is larger than the sum of its proper divisors (636147929).

1321230231 is an equidigital number, since it uses as much as digits as its factorization.

1321230231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48934462 (or 48934456 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1321230231 is about 36348.7308031518. The cubic root of 1321230231 is about 1097.3019914917.

Adding to 1321230231 its reverse (1320321231), we get a palindrome (2641551462).

The spelling of 1321230231 in words is "one billion, three hundred twenty-one million, two hundred thirty thousand, two hundred thirty-one".