1321324404220 has 48 divisors (see below), whose sum is σ = 2895544427328. Its totient is φ = 505529164800.

The previous prime is 1321324404203. The next prime is 1321324404221. The reversal of 1321324404220 is 224044231231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321324404221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15275332 + ... + 15361588.

It is an arithmetic number, because the mean of its divisors is an integer number (60323842236).

Almost surely, 2^{1321324404220} is an apocalyptic number.

1321324404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321324404220 is an abundant number, since it is smaller than the sum of its proper divisors (1574220023108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321324404220 is a wasteful number, since it uses less digits than its factorization.

1321324404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119590 (or 119588 counting only the distinct ones).

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

Adding to 1321324404220 its reverse (224044231231), we get a palindrome (1545368635451).

The spelling of 1321324404220 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-four million, four hundred four thousand, two hundred twenty".