21201011201 has 8 divisors (see below), whose sum is σ = 21759219360. Its totient is φ = 20649914208.

The previous prime is 21201011173. The next prime is 21201011213. The reversal of 21201011201 is 10211010212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201011201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201011401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771751 + ... + 1783676.

It is an arithmetic number, because the mean of its divisors is an integer number (2719902420).

Almost surely, 2^21201011201 is an apocalyptic number.

It is an amenable number.

21201011201 is a deficient number, since it is larger than the sum of its proper divisors (558208159).

21201011201 is an equidigital number, since it uses as much as digits as its factorization.

21201011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555583.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21201011201 its reverse (10211010212), we get a palindrome (31412021413).

The spelling of 21201011201 in words is "twenty-one billion, two hundred one million, eleven thousand, two hundred one".