13012010221 has 6 divisors (see below), whose sum is σ = 15136420110. Its totient is φ = 11153151576.

The previous prime is 13012010213. The next prime is 13012010251. The reversal of 13012010221 is 12201021031.

13012010221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12411074025 + 600936196 = 111405^2 + 24514^2 .

It is not a de Polignac number, because 13012010221 - 2³ = 13012010213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012010201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132775566 + ... + 132775663.

It is an arithmetic number, because the mean of its divisors is an integer number (2522736685).

Almost surely, 2^13012010221 is an apocalyptic number.

It is an amenable number.

13012010221 is a deficient number, since it is larger than the sum of its proper divisors (2124409889).

13012010221 is an equidigital number, since it uses as much as digits as its factorization.

13012010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265551243 (or 265551236 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 13012010221 its reverse (12201021031), we get a palindrome (25213031252).

The spelling of 13012010221 in words is "thirteen billion, twelve million, ten thousand, two hundred twenty-one".