1231441321 has 12 divisors (see below), whose sum is σ = 1412421696. Its totient is φ = 1070816120.

The previous prime is 1231441271. The next prime is 1231441397.

1231441321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1231441321 - 2¹¹ = 1231439273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231441292 and 1231441301.

It is not an unprimeable number, because it can be changed into a prime (1231441721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218461 + ... + 224026.

It is an arithmetic number, because the mean of its divisors is an integer number (117701808).

Almost surely, 2^1231441321 is an apocalyptic number.

1231441321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231441321 is a deficient number, since it is larger than the sum of its proper divisors (180980375).

1231441321 is a wasteful number, since it uses less digits than its factorization.

1231441321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442532 (or 442521 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1231441321 is about 35091.8982245190. The cubic root of 1231441321 is about 1071.8596133200.

It can be divided in two parts, 12314 and 41321, that added together give a palindrome (53635).

The spelling of 1231441321 in words is "one billion, two hundred thirty-one million, four hundred forty-one thousand, three hundred twenty-one".