21200022001 has 8 divisors (see below), whose sum is σ = 22128225984. Its totient is φ = 20272356720.

The previous prime is 21200021993. The next prime is 21200022007. The reversal of 21200022001 is 10022000212.

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 21200022001 - 2³ = 21200021993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200022007) 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, 53190 + ... + 212671.

It is an arithmetic number, because the mean of its divisors is an integer number (2766028248).

Almost surely, 2^21200022001 is an apocalyptic number.

It is an amenable number.

21200022001 is a deficient number, since it is larger than the sum of its proper divisors (928203983).

21200022001 is a wasteful number, since it uses less digits than its factorization.

21200022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269351.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21200022001 its reverse (10022000212), we get a palindrome (31222022213).

The spelling of 21200022001 in words is "twenty-one billion, two hundred million, twenty-two thousand, one".