1231353321 has 8 divisors (see below), whose sum is σ = 1791059424. Its totient is φ = 746274720.

The previous prime is 1231353313. The next prime is 1231353337. The reversal of 1231353321 is 1233531321.

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

It is not a de Polignac number, because 1231353321 - 2³ = 1231353313 is a prime.

It is a super-2 number, since 2×1231353321² = 3032462002275458082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231353291 and 1231353300.

It is not an unprimeable number, because it can be changed into a prime (1231353371) 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, 18656836 + ... + 18656901.

It is an arithmetic number, because the mean of its divisors is an integer number (223882428).

Almost surely, 2^1231353321 is an apocalyptic number.

1231353321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231353321 is a deficient number, since it is larger than the sum of its proper divisors (559706103).

1231353321 is a wasteful number, since it uses less digits than its factorization.

1231353321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37313751.

The product of its digits is 1620, while the sum is 24.

The square root of 1231353321 is about 35090.6443514507. The cubic root of 1231353321 is about 1071.8340806667.

Adding to 1231353321 its reverse (1233531321), we get a palindrome (2464884642).

The spelling of 1231353321 in words is "one billion, two hundred thirty-one million, three hundred fifty-three thousand, three hundred twenty-one".