1321224321345 has 8 divisors (see below), whose sum is σ = 2113958914176. Its totient is φ = 704652971376.

The previous prime is 1321224321299. The next prime is 1321224321367. The reversal of 1321224321345 is 5431234221231.

It is a happy number.

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

It is not a de Polignac number, because 1321224321345 - 2⁶ = 1321224321281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44040810697 + ... + 44040810726.

It is an arithmetic number, because the mean of its divisors is an integer number (264244864272).

Almost surely, 2^{1321224321345} is an apocalyptic number.

1321224321345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321224321345 is a deficient number, since it is larger than the sum of its proper divisors (792734592831).

1321224321345 is an equidigital number, since it uses as much as digits as its factorization.

1321224321345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88081621431.

The product of its digits is 34560, while the sum is 33.

Adding to 1321224321345 its reverse (5431234221231), we get a palindrome (6752458542576).

The spelling of 1321224321345 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-four million, three hundred twenty-one thousand, three hundred forty-five".