21213543315002 has 8 divisors (see below), whose sum is σ = 31842520360596. Its totient is φ = 10599369861472.

The previous prime is 21213543314923. The next prime is 21213543315053. The reversal of 21213543315002 is 20051334531212.

It can be written as a sum of positive squares in 2 ways, for example, as 20311345389721 + 902197925281 = 4506811^2 + 949841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21213543315002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3700894433 + ... + 3700900164.

Almost surely, 2^{21213543315002} is an apocalyptic number.

21213543315002 is a deficient number, since it is larger than the sum of its proper divisors (10628977045594).

21213543315002 is a wasteful number, since it uses less digits than its factorization.

21213543315002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7401796032.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 21213543315002 its reverse (20051334531212), we get a palindrome (41264877846214).

The spelling of 21213543315002 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, two".