1331224321 has 8 divisors (see below), whose sum is σ = 1610893440. Its totient is φ = 1073928768.

The previous prime is 1331224319. The next prime is 1331224331. The reversal of 1331224321 is 1234221331.

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 1331224321 - 2¹ = 1331224319 is a prime.

It is a super-2 number, since 2×1331224321² = 3544316385643822082, 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 = 1331224292 and 1331224301.

It is not an unprimeable number, because it can be changed into a prime (1331224331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593261 + ... + 5593498.

It is an arithmetic number, because the mean of its divisors is an integer number (201361680).

Almost surely, 2^1331224321 is an apocalyptic number.

It is an amenable number.

1331224321 is a deficient number, since it is larger than the sum of its proper divisors (279669119).

1331224321 is a wasteful number, since it uses less digits than its factorization.

1331224321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186783.

The product of its digits is 864, while the sum is 22.

The square root of 1331224321 is about 36485.9468974015. The cubic root of 1331224321 is about 1100.0617929474.

Adding to 1331224321 its reverse (1234221331), we get a palindrome (2565445652).

The spelling of 1331224321 in words is "one billion, three hundred thirty-one million, two hundred twenty-four thousand, three hundred twenty-one".