21000321201 has 8 divisors (see below), whose sum is σ = 28039374720. Its totient is φ = 13980740912.

The previous prime is 21000321193. The next prime is 21000321217. The reversal of 21000321201 is 10212300012.

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 21000321201 - 2³ = 21000321193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000321101) 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, 4865790 + ... + 4870103.

It is an arithmetic number, because the mean of its divisors is an integer number (3504921840).

Almost surely, 2^21000321201 is an apocalyptic number.

It is an amenable number.

21000321201 is a deficient number, since it is larger than the sum of its proper divisors (7039053519).

21000321201 is an equidigital number, since it uses as much as digits as its factorization.

21000321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9736615.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21000321201 its reverse (10212300012), we get a palindrome (31212621213).

The spelling of 21000321201 in words is "twenty-one billion, three hundred twenty-one thousand, two hundred one".