21213543306035 has 16 divisors (see below), whose sum is σ = 27173463932160. Its totient is φ = 15851187283680.

The previous prime is 21213543306023. The next prime is 21213543306061. The reversal of 21213543306035 is 53060334531212.

It is not a de Polignac number, because 21213543306035 - 2⁶ = 21213543305971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21213543306035.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1572531677 + ... + 1572545166.

It is an arithmetic number, because the mean of its divisors is an integer number (1698341495760).

Almost surely, 2^{21213543306035} is an apocalyptic number.

21213543306035 is a deficient number, since it is larger than the sum of its proper divisors (5959920626125).

21213543306035 is a wasteful number, since it uses less digits than its factorization.

21213543306035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145076938.

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 21213543306035 its reverse (53060334531212), we get a palindrome (74273877837247).

The spelling of 21213543306035 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred six thousand, thirty-five".