13100320121221 has 4 divisors (see below), whose sum is σ = 13106873560000. Its totient is φ = 13093766682444.

The previous prime is 13100320121219. The next prime is 13100320121293. The reversal of 13100320121221 is 12212102300131.

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 13100320121221 - 2¹ = 13100320121219 is a prime.

It is a super-2 number, since 2×13100320121221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13100320121621) 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, 3276716391 + ... + 3276720388.

It is an arithmetic number, because the mean of its divisors is an integer number (3276718390000).

Almost surely, 2^{13100320121221} is an apocalyptic number.

It is an amenable number.

13100320121221 is a deficient number, since it is larger than the sum of its proper divisors (6553438779).

13100320121221 is an equidigital number, since it uses as much as digits as its factorization.

13100320121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553438778.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 13100320121221 its reverse (12212102300131), we get a palindrome (25312422421352).

The spelling of 13100320121221 in words is "thirteen trillion, one hundred billion, three hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".