1321034434432 has 64 divisors (see below), whose sum is σ = 2777241373200. Its totient is φ = 624176492544.

The previous prime is 1321034434429. The next prime is 1321034434439. The reversal of 1321034434432 is 2344344301231.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321034434439) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 281388 + ... + 1649620.

Almost surely, 2^{1321034434432} 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 1321034434432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388620686600).

1321034434432 is an abundant number, since it is smaller than the sum of its proper divisors (1456206938768).

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

1321034434432 is a wasteful number, since it uses less digits than its factorization.

1321034434432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368663 (or 1368651 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 1321034434432 its reverse (2344344301231), we get a palindrome (3665378735663).

The spelling of 1321034434432 in words is "one trillion, three hundred twenty-one billion, thirty-four million, four hundred thirty-four thousand, four hundred thirty-two".