13101121201221 has 12 divisors (see below), whose sum is σ = 19008702014848. Its totient is φ = 8694914517864.

The previous prime is 13101121201169. The next prime is 13101121201237. The reversal of 13101121201221 is 12210212110131.

It is a happy number.

13101121201221 is a `hidden beast` number, since 1 + 310 + 1 + 12 + 120 + 1 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13101121201221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13101121201194 and 13101121201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13101121201261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3263854795 + ... + 3263858808.

Almost surely, 2^{13101121201221} is an apocalyptic number.

It is an amenable number.

13101121201221 is a deficient number, since it is larger than the sum of its proper divisors (5907580813627).

13101121201221 is a wasteful number, since it uses less digits than its factorization.

13101121201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6527713832 (or 6527713829 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 13101121201221 its reverse (12210212110131), we get a palindrome (25311333311352).

The spelling of 13101121201221 in words is "thirteen trillion, one hundred one billion, one hundred twenty-one million, two hundred one thousand, two hundred twenty-one".