13121320032101 has 4 divisors (see below), whose sum is σ = 13126192415052. Its totient is φ = 13116447649152.

The previous prime is 13121320032091. The next prime is 13121320032109. The reversal of 13121320032101 is 10123002312131.

It is a happy number.

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 7315677972001 + 5805642060100 = 2704751^2 + 2409490^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121320032101 - 2³⁴ = 13104140162917 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 (13121320032109) 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, 2436187436 + ... + 2436192821.

It is an arithmetic number, because the mean of its divisors is an integer number (3281548103763).

Almost surely, 2^{13121320032101} is an apocalyptic number.

It is an amenable number.

13121320032101 is a deficient number, since it is larger than the sum of its proper divisors (4872382951).

13121320032101 is an equidigital number, since it uses as much as digits as its factorization.

13121320032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872382950.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13121320032101 its reverse (10123002312131), we get a palindrome (23244322344232).

The spelling of 13121320032101 in words is "thirteen trillion, one hundred twenty-one billion, three hundred twenty million, thirty-two thousand, one hundred one".