13021312012121 has 32 divisors (see below), whose sum is σ = 15584509624320. Its totient is φ = 10637421626304.

The previous prime is 13021312012117. The next prime is 13021312012129. The reversal of 13021312012121 is 12121021312031.

It is not a de Polignac number, because 13021312012121 - 2² = 13021312012117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13021312012093 and 13021312012102.

It is not an unprimeable number, because it can be changed into a prime (13021312012129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62360390 + ... + 62568848.

It is an arithmetic number, because the mean of its divisors is an integer number (487015925760).

Almost surely, 2^{13021312012121} is an apocalyptic number.

It is an amenable number.

13021312012121 is a deficient number, since it is larger than the sum of its proper divisors (2563197612199).

13021312012121 is a wasteful number, since it uses less digits than its factorization.

13021312012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209885.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 13021312012121 its reverse (12121021312031), we get a palindrome (25142333324152).

The spelling of 13021312012121 in words is "thirteen trillion, twenty-one billion, three hundred twelve million, twelve thousand, one hundred twenty-one".