13443123321001 has 16 divisors (see below), whose sum is σ = 15154854251328. Its totient is φ = 11818625112000.

The previous prime is 13443123320989. The next prime is 13443123321007. The reversal of 13443123321001 is 10012332134431.

13443123321001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13443123321001 - 2²³ = 13443114932393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13443123321007) 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, 140650146 + ... + 140745691.

It is an arithmetic number, because the mean of its divisors is an integer number (947178390708).

Almost surely, 2^{13443123321001} is an apocalyptic number.

13443123321001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13443123321001 is a deficient number, since it is larger than the sum of its proper divisors (1711730930327).

13443123321001 is a wasteful number, since it uses less digits than its factorization.

13443123321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281395992.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 13443123321001 its reverse (10012332134431), we get a palindrome (23455455455432).

It can be divided in two parts, 134431 and 23321001, that added together give a palindrome (23455432).

The spelling of 13443123321001 in words is "thirteen trillion, four hundred forty-three billion, one hundred twenty-three million, three hundred twenty-one thousand, one".