21001000200163 has 8 divisors (see below), whose sum is σ = 21194499365600. Its totient is φ = 20807516115648.

The previous prime is 21001000200161. The next prime is 21001000200203. The reversal of 21001000200163 is 36100200010012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001000200163 - 2¹ = 21001000200161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001000200161) 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, 962706 + ... + 6552007.

It is an arithmetic number, because the mean of its divisors is an integer number (2649312420700).

Almost surely, 2^{21001000200163} is an apocalyptic number.

21001000200163 is a deficient number, since it is larger than the sum of its proper divisors (193499165437).

21001000200163 is a wasteful number, since it uses less digits than its factorization.

21001000200163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540461.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21001000200163 its reverse (36100200010012), we get a palindrome (57101200210175).

The spelling of 21001000200163 in words is "twenty-one trillion, one billion, two hundred thousand, one hundred sixty-three".