1321220324224 has 32 divisors (see below), whose sum is σ = 2632878253800. Its totient is φ = 660419507712.

The previous prime is 1321220324161. The next prime is 1321220324309. The reversal of 1321220324224 is 4224230221231.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×1321220324224³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321220324192 and 1321220324201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043722 + ... + 1931785.

Almost surely, 2^{1321220324224} is an apocalyptic number.

It is an amenable number.

1321220324224 is a deficient number, since it is larger than the sum of its proper divisors (1311657929576).

1321220324224 is an equidigital number, since it uses as much as digits as its factorization.

1321220324224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978990 (or 2978978 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1321220324224 its reverse (4224230221231), we get a palindrome (5545450545455).

The spelling of 1321220324224 in words is "one trillion, three hundred twenty-one billion, two hundred twenty million, three hundred twenty-four thousand, two hundred twenty-four".