21213543315003 has 32 divisors (see below), whose sum is σ = 32077952712960. Its totient is φ = 12361895118720.

The previous prime is 21213543314923. The next prime is 21213543315053. The reversal of 21213543315003 is 30051334531212.

It is not a de Polignac number, because 21213543315003 - 2¹³ = 21213543306811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213543315053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4719628 + ... + 8043753.

It is an arithmetic number, because the mean of its divisors is an integer number (1002436022280).

Almost surely, 2^{21213543315003} is an apocalyptic number.

21213543315003 is a deficient number, since it is larger than the sum of its proper divisors (10864409397957).

21213543315003 is a wasteful number, since it uses less digits than its factorization.

21213543315003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12765659.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 21213543315003 its reverse (30051334531212), we get a palindrome (51264877846215).

The spelling of 21213543315003 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, three".