21000201120001 has 4 divisors (see below), whose sum is σ = 21204086567872. Its totient is φ = 20796315672132.

The previous prime is 21000201119999. The next prime is 21000201120103. The reversal of 21000201120001 is 10002110200012.

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 not a de Polignac number, because 21000201120001 - 2¹ = 21000201119999 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 21000201120001.

It is not an unprimeable number, because it can be changed into a prime (21000201126001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101942723781 + ... + 101942723986.

It is an arithmetic number, because the mean of its divisors is an integer number (5301021641968).

Almost surely, 2^{21000201120001} is an apocalyptic number.

It is an amenable number.

21000201120001 is a deficient number, since it is larger than the sum of its proper divisors (203885447871).

21000201120001 is a wasteful number, since it uses less digits than its factorization.

21000201120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203885447870.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000201120001 its reverse (10002110200012), we get a palindrome (31002311320013).

The spelling of 21000201120001 in words is "twenty-one trillion, two hundred one million, one hundred twenty thousand, one".