13212121104121 has 16 divisors (see below), whose sum is σ = 13336419685248. Its totient is φ = 13088193289600.

The previous prime is 13212121104113. The next prime is 13212121104197. The reversal of 13212121104121 is 12140112121231.

It is a cyclic number.

It is not a de Polignac number, because 13212121104121 - 2³ = 13212121104113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13212121104092 and 13212121104101.

It is not an unprimeable number, because it can be changed into a prime (13212121504121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232550700 + ... + 232607506.

It is an arithmetic number, because the mean of its divisors is an integer number (833526230328).

Almost surely, 2^{13212121104121} is an apocalyptic number.

It is an amenable number.

13212121104121 is a deficient number, since it is larger than the sum of its proper divisors (124298581127).

13212121104121 is a wasteful number, since it uses less digits than its factorization.

13212121104121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60032.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 13212121104121 its reverse (12140112121231), we get a palindrome (25352233225352).

The spelling of 13212121104121 in words is "thirteen trillion, two hundred twelve billion, one hundred twenty-one million, one hundred four thousand, one hundred twenty-one".