213102105 has 16 divisors (see below), whose sum is σ = 345281280. Its totient is φ = 112215168.

The previous prime is 213102079. The next prime is 213102139. The reversal of 213102105 is 501201312.

It is not a de Polignac number, because 213102105 - 2⁸ = 213101849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88732 + ... + 91101.

It is an arithmetic number, because the mean of its divisors is an integer number (21580080).

Almost surely, 2^213102105 is an apocalyptic number.

It is an amenable number.

213102105 is a deficient number, since it is larger than the sum of its proper divisors (132179175).

213102105 is a wasteful number, since it uses less digits than its factorization.

213102105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179920.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 213102105 is about 14598.0171598748. The cubic root of 213102105 is about 597.3046740494.

Adding to 213102105 its reverse (501201312), we get a palindrome (714303417).

The spelling of 213102105 in words is "two hundred thirteen million, one hundred two thousand, one hundred five".