13321020121021 has 8 divisors (see below), whose sum is σ = 14364129528000. Its totient is φ = 12312111022560.

The previous prime is 13321020121001. The next prime is 13321020121037. The reversal of 13321020121021 is 12012102012331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13321020121021 - 2¹⁹ = 13321019596733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13321020121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321020121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8550076321 + ... + 8550077878.

It is an arithmetic number, because the mean of its divisors is an integer number (1795516191000).

Almost surely, 2^{13321020121021} is an apocalyptic number.

It is an amenable number.

13321020121021 is a deficient number, since it is larger than the sum of its proper divisors (1043109406979).

13321020121021 is a wasteful number, since it uses less digits than its factorization.

13321020121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17100154259.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 13321020121021 its reverse (12012102012331), we get a palindrome (25333122133352).

The spelling of 13321020121021 in words is "thirteen trillion, three hundred twenty-one billion, twenty million, one hundred twenty-one thousand, twenty-one".