213321105 has 12 divisors (see below), whose sum is σ = 369756660. Its totient is φ = 113771232.

The previous prime is 213321091. The next prime is 213321107. The reversal of 213321105 is 501123312.

It can be written as a sum of positive squares in 2 ways, for example, as 122080401 + 91240704 = 11049^2 + 9552^2 .

It is not a de Polignac number, because 213321105 - 2⁴ = 213321089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213321107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2370190 + ... + 2370279.

It is an arithmetic number, because the mean of its divisors is an integer number (30813055).

Almost surely, 2^213321105 is an apocalyptic number.

It is an amenable number.

213321105 is a deficient number, since it is larger than the sum of its proper divisors (156435555).

213321105 is a wasteful number, since it uses less digits than its factorization.

213321105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740480 (or 4740477 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 213321105 is about 14605.5162524301. The cubic root of 213321105 is about 597.5092159663.

Adding to 213321105 its reverse (501123312), we get a palindrome (714444417).

The spelling of 213321105 in words is "two hundred thirteen million, three hundred twenty-one thousand, one hundred five".