21213543315302 has 32 divisors (see below), whose sum is σ = 34344818750592. Its totient is φ = 9768930361344.

The previous prime is 21213543315301. The next prime is 21213543315319. The reversal of 21213543315302 is 20351334531212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213543315301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164820158 + ... + 164948814.

It is an arithmetic number, because the mean of its divisors is an integer number (1073275585956).

Almost surely, 2^{21213543315302} is an apocalyptic number.

21213543315302 is a deficient number, since it is larger than the sum of its proper divisors (13131275435290).

21213543315302 is a wasteful number, since it uses less digits than its factorization.

21213543315302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142832.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 21213543315302 its reverse (20351334531212), we get a palindrome (41564877846514).

The spelling of 21213543315302 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, three hundred two".