13212221213121 has 16 divisors (see below), whose sum is σ = 20623955065728. Its totient is φ = 7365698236800.

The previous prime is 13212221213101. The next prime is 13212221213143. The reversal of 13212221213121 is 12131212221231.

It is not a de Polignac number, because 13212221213121 - 2⁵ = 13212221213089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13212221213091 and 13212221213100.

It is not an unprimeable number, because it can be changed into a prime (13212221213101) 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, 7672601470 + ... + 7672603191.

It is an arithmetic number, because the mean of its divisors is an integer number (1288997191608).

Almost surely, 2^{13212221213121} is an apocalyptic number.

It is an amenable number.

13212221213121 is a deficient number, since it is larger than the sum of its proper divisors (7411733852607).

13212221213121 is a wasteful number, since it uses less digits than its factorization.

13212221213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15345204712.

The product of its digits is 576, while the sum is 24.

Adding to 13212221213121 its reverse (12131212221231), we get a palindrome (25343433434352).

The spelling of 13212221213121 in words is "thirteen trillion, two hundred twelve billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred twenty-one".