1321301322012 has 48 divisors (see below), whose sum is σ = 3527214792192. Its totient is φ = 377113456320.

The previous prime is 1321301322001. The next prime is 1321301322053. The reversal of 1321301322012 is 2102231031231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1321301322012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8278968 + ... + 8437055.

It is an arithmetic number, because the mean of its divisors is an integer number (73483641504).

Almost surely, 2^{1321301322012} is an apocalyptic number.

1321301322012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321301322012 is an abundant number, since it is smaller than the sum of its proper divisors (2205913470180).

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

1321301322012 is a wasteful number, since it uses less digits than its factorization.

1321301322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16716978 (or 16716976 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1321301322012 its reverse (2102231031231), we get a palindrome (3423532353243).

The spelling of 1321301322012 in words is "one trillion, three hundred twenty-one billion, three hundred one million, three hundred twenty-two thousand, twelve".