21201011202201 has 4 divisors (see below), whose sum is σ = 28268014936272. Its totient is φ = 14134007468132.

The previous prime is 21201011202167. The next prime is 21201011202233. The reversal of 21201011202201 is 10220211010212.

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 21201011202201 - 2¹⁴ = 21201011185817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201011202271) 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, 3533501867031 + ... + 3533501867036.

It is an arithmetic number, because the mean of its divisors is an integer number (7067003734068).

Almost surely, 2^{21201011202201} is an apocalyptic number.

It is an amenable number.

21201011202201 is a deficient number, since it is larger than the sum of its proper divisors (7067003734071).

21201011202201 is an equidigital number, since it uses as much as digits as its factorization.

21201011202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067003734070.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201011202201 its reverse (10220211010212), we get a palindrome (31421222212413).

The spelling of 21201011202201 in words is "twenty-one trillion, two hundred one billion, eleven million, two hundred two thousand, two hundred one".