21012304214203 has 8 divisors (see below), whose sum is σ = 21595869063680. Its totient is φ = 20436679022760.

The previous prime is 21012304214197. The next prime is 21012304214233. The reversal of 21012304214203 is 30241240321012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21012304214203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012304214233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984909143 + ... + 1984919728.

It is an arithmetic number, because the mean of its divisors is an integer number (2699483632960).

Almost surely, 2^{21012304214203} is an apocalyptic number.

21012304214203 is a deficient number, since it is larger than the sum of its proper divisors (583564849477).

21012304214203 is an equidigital number, since it uses as much as digits as its factorization.

21012304214203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969829017.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21012304214203 its reverse (30241240321012), we get a palindrome (51253544535215).

The spelling of 21012304214203 in words is "twenty-one trillion, twelve billion, three hundred four million, two hundred fourteen thousand, two hundred three".