13320203123021 has 4 divisors (see below), whose sum is σ = 13320218992572. Its totient is φ = 13320187253472.

The previous prime is 13320203123011. The next prime is 13320203123027. The reversal of 13320203123021 is 12032130202331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7890902355625 + 5429300767396 = 2809075^2 + 2330086^2 .

It is a cyclic number.

It is not a de Polignac number, because 13320203123021 - 2⁶ = 13320203122957 is a prime.

It is a super-2 number, since 2×13320203123021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320203123027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6601010 + ... + 8379363.

It is an arithmetic number, because the mean of its divisors is an integer number (3330054748143).

Almost surely, 2^{13320203123021} is an apocalyptic number.

It is an amenable number.

13320203123021 is a deficient number, since it is larger than the sum of its proper divisors (15869551).

13320203123021 is an equidigital number, since it uses as much as digits as its factorization.

13320203123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15869550.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 13320203123021 its reverse (12032130202331), we get a palindrome (25352333325352).

The spelling of 13320203123021 in words is "thirteen trillion, three hundred twenty billion, two hundred three million, one hundred twenty-three thousand, twenty-one".