13121021221201 has 4 divisors (see below), whose sum is σ = 13544279970304. Its totient is φ = 12697762472100.

The previous prime is 13121021221169. The next prime is 13121021221229. The reversal of 13121021221201 is 10212212012131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13121021221201 - 2⁵ = 13121021221169 is a prime.

It is a super-2 number, since 2×13121021221201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121021221901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211629374505 + ... + 211629374566.

It is an arithmetic number, because the mean of its divisors is an integer number (3386069992576).

Almost surely, 2^{13121021221201} is an apocalyptic number.

It is an amenable number.

13121021221201 is a deficient number, since it is larger than the sum of its proper divisors (423258749103).

13121021221201 is an equidigital number, since it uses as much as digits as its factorization.

13121021221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423258749102.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 13121021221201 its reverse (10212212012131), we get a palindrome (23333233233332).

The spelling of 13121021221201 in words is "thirteen trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, two hundred one".