213105321001 has 4 divisors (see below), whose sum is σ = 215499762900. Its totient is φ = 210710879104.

The previous prime is 213105320999. The next prime is 213105321007. The reversal of 213105321001 is 100123501312.

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 115026114025 + 98079206976 = 339155^2 + 313176^2 .

It is a cyclic number.

It is not a de Polignac number, because 213105321001 - 2¹ = 213105320999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213105321001.

It is not an unprimeable number, because it can be changed into a prime (213105321007) 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, 1197220816 + ... + 1197220993.

It is an arithmetic number, because the mean of its divisors is an integer number (53874940725).

Almost surely, 2^213105321001 is an apocalyptic number.

It is an amenable number.

213105321001 is a deficient number, since it is larger than the sum of its proper divisors (2394441899).

213105321001 is an equidigital number, since it uses as much as digits as its factorization.

213105321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394441898.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 213105321001 its reverse (100123501312), we get a palindrome (313228822313).

The spelling of 213105321001 in words is "two hundred thirteen billion, one hundred five million, three hundred twenty-one thousand, one".