21012514203 has 8 divisors (see below), whose sum is σ = 28668236608. Its totient is φ = 13682567304.

The previous prime is 21012514177. The next prime is 21012514217. The reversal of 21012514203 is 30241521012.

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

It is not a de Polignac number, because 21012514203 - 2⁶ = 21012514139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21012514203.

It is not an unprimeable number, because it can be changed into a prime (21012512203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81443725 + ... + 81443982.

It is an arithmetic number, because the mean of its divisors is an integer number (3583529576).

Almost surely, 2^21012514203 is an apocalyptic number.

21012514203 is a deficient number, since it is larger than the sum of its proper divisors (7655722405).

21012514203 is a wasteful number, since it uses less digits than its factorization.

21012514203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162887753.

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 21012514203 in words is "twenty-one billion, twelve million, five hundred fourteen thousand, two hundred three".