1321224514421 has 4 divisors (see below), whose sum is σ = 1509970873632. Its totient is φ = 1132478155212.

The previous prime is 1321224514397. The next prime is 1321224514453. The reversal of 1321224514421 is 1244154221231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321224514421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321224511421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94373179595 + ... + 94373179608.

It is an arithmetic number, because the mean of its divisors is an integer number (377492718408).

Almost surely, 2^{1321224514421} is an apocalyptic number.

It is an amenable number.

1321224514421 is a deficient number, since it is larger than the sum of its proper divisors (188746359211).

1321224514421 is an equidigital number, since it uses as much as digits as its factorization.

1321224514421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188746359210.

The product of its digits is 15360, while the sum is 32.

Adding to 1321224514421 its reverse (1244154221231), we get a palindrome (2565378735652).

The spelling of 1321224514421 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-four million, five hundred fourteen thousand, four hundred twenty-one".