21002001302203 has 8 divisors (see below), whose sum is σ = 21057627625200. Its totient is φ = 20946376096128.

The previous prime is 21002001302173. The next prime is 21002001302207. The reversal of 21002001302203 is 30220310020012.

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-21002001302203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002001302207) 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, 48755775 + ... + 49184647.

It is an arithmetic number, because the mean of its divisors is an integer number (2632203453150).

Almost surely, 2^{21002001302203} is an apocalyptic number.

21002001302203 is a deficient number, since it is larger than the sum of its proper divisors (55626322997).

21002001302203 is a wasteful number, since it uses less digits than its factorization.

21002001302203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558461.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21002001302203 its reverse (30220310020012), we get a palindrome (51222311322215).

The spelling of 21002001302203 in words is "twenty-one trillion, two billion, one million, three hundred two thousand, two hundred three".