13201331123021 has 4 divisors (see below), whose sum is σ = 13322444252700. Its totient is φ = 13080217993344.

The previous prime is 13201331123003. The next prime is 13201331123041. The reversal of 13201331123021 is 12032113310231.

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 10048170913225 + 3153160209796 = 3169885^2 + 1775714^2 .

It is a cyclic number.

It is not a de Polignac number, because 13201331123021 - 2⁶ = 13201331122957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13201331123041) 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, 60556564676 + ... + 60556564893.

It is an arithmetic number, because the mean of its divisors is an integer number (3330611063175).

Almost surely, 2^{13201331123021} is an apocalyptic number.

It is an amenable number.

13201331123021 is a deficient number, since it is larger than the sum of its proper divisors (121113129679).

13201331123021 is a wasteful number, since it uses less digits than its factorization.

13201331123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121113129678.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13201331123021 its reverse (12032113310231), we get a palindrome (25233444433252).

The spelling of 13201331123021 in words is "thirteen trillion, two hundred one billion, three hundred thirty-one million, one hundred twenty-three thousand, twenty-one".