1231003321 has 8 divisors (see below), whose sum is σ = 1243235840. Its totient is φ = 1218819312.

The previous prime is 1231003313. The next prime is 1231003327. The reversal of 1231003321 is 1233001321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231003321 - 2³ = 1231003313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231003295 and 1231003304.

It is not an unprimeable number, because it can be changed into a prime (1231003327) 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 7 ways as a sum of consecutive naturals, for example, 39976 + ... + 63718.

It is an arithmetic number, because the mean of its divisors is an integer number (155404480).

Almost surely, 2^1231003321 is an apocalyptic number.

It is an amenable number.

1231003321 is a deficient number, since it is larger than the sum of its proper divisors (12232519).

1231003321 is a wasteful number, since it uses less digits than its factorization.

1231003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24255.

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

The square root of 1231003321 is about 35085.6569127614. The cubic root of 1231003321 is about 1071.7325182987.

Adding to 1231003321 its reverse (1233001321), we get a palindrome (2464004642).

The spelling of 1231003321 in words is "one billion, two hundred thirty-one million, three thousand, three hundred twenty-one".