1321003452352 has 112 divisors (see below), whose sum is σ = 2765353676800. Its totient is φ = 625306106880.

The previous prime is 1321003452341. The next prime is 1321003452371. The reversal of 1321003452352 is 2532543001231.

It is a super-2 number, since 2×1321003452352² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17045563 + ... + 17122885.

Almost surely, 2^{1321003452352} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321003452352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1382676838400).

1321003452352 is an abundant number, since it is smaller than the sum of its proper divisors (1444350224448).

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

1321003452352 is a wasteful number, since it uses less digits than its factorization.

1321003452352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77554 (or 77544 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 1321003452352 its reverse (2532543001231), we get a palindrome (3853546453583).

The spelling of 1321003452352 in words is "one trillion, three hundred twenty-one billion, three million, four hundred fifty-two thousand, three hundred fifty-two".