13121200212221 has 16 divisors (see below), whose sum is σ = 13187697868800. Its totient is φ = 13054888117488.

The previous prime is 13121200212191. The next prime is 13121200212271. The reversal of 13121200212221 is 12221200212131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121200212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121200212193 and 13121200212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121200212271) 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, 700946900 + ... + 700965618.

It is an arithmetic number, because the mean of its divisors is an integer number (824231116800).

Almost surely, 2^{13121200212221} is an apocalyptic number.

It is an amenable number.

13121200212221 is a deficient number, since it is larger than the sum of its proper divisors (66497656579).

13121200212221 is a wasteful number, since it uses less digits than its factorization.

13121200212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23488.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 13121200212221 its reverse (12221200212131), we get a palindrome (25342400424352).

The spelling of 13121200212221 in words is "thirteen trillion, one hundred twenty-one billion, two hundred million, two hundred twelve thousand, two hundred twenty-one".