13131120121021 has 8 divisors (see below), whose sum is σ = 15011293218624. Its totient is φ = 11252021722080.

The previous prime is 13131120121003. The next prime is 13131120121057. The reversal of 13131120121021 is 12012102113131.

13131120121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13131120121021 - 2¹³ = 13131120112829 is a prime.

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 13131120121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131120121621) 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, 268648480 + ... + 268697353.

It is an arithmetic number, because the mean of its divisors is an integer number (1876411652328).

Almost surely, 2^{13131120121021} is an apocalyptic number.

It is an amenable number.

13131120121021 is a deficient number, since it is larger than the sum of its proper divisors (1880173097603).

13131120121021 is an equidigital number, since it uses as much as digits as its factorization.

13131120121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537349331.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 13131120121021 its reverse (12012102113131), we get a palindrome (25143222234152).

The spelling of 13131120121021 in words is "thirteen trillion, one hundred thirty-one billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".