21001112210201 has 4 divisors (see below), whose sum is σ = 21118436859600. Its totient is φ = 20883787560804.

The previous prime is 21001112210159. The next prime is 21001112210251. The reversal of 21001112210201 is 10201221110012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001112210201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001112210251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58662324431 + ... + 58662324788.

It is an arithmetic number, because the mean of its divisors is an integer number (5279609214900).

Almost surely, 2^{21001112210201} is an apocalyptic number.

It is an amenable number.

21001112210201 is a deficient number, since it is larger than the sum of its proper divisors (117324649399).

21001112210201 is a wasteful number, since it uses less digits than its factorization.

21001112210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117324649398.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21001112210201 its reverse (10201221110012), we get a palindrome (31202333320213).

The spelling of 21001112210201 in words is "twenty-one trillion, one billion, one hundred twelve million, two hundred ten thousand, two hundred one".