13105301021 has 4 divisors (see below), whose sum is σ = 13105822044. Its totient is φ = 13104780000.

The previous prime is 13105300993. The next prime is 13105301029. The reversal of 13105301021 is 12010350131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6097267225 + 7008033796 = 78085^2 + 83714^2 .

It is a cyclic number.

It is not a de Polignac number, because 13105301021 - 2¹⁰ = 13105299997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13105301029) 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, 220760 + ... + 273761.

It is an arithmetic number, because the mean of its divisors is an integer number (3276455511).

Almost surely, 2^13105301021 is an apocalyptic number.

It is an amenable number.

13105301021 is a deficient number, since it is larger than the sum of its proper divisors (521023).

13105301021 is an equidigital number, since it uses as much as digits as its factorization.

13105301021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521022.

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 13105301021 its reverse (12010350131), we get a palindrome (25115651152).

The spelling of 13105301021 in words is "thirteen billion, one hundred five million, three hundred one thousand, twenty-one".