21211200022201 has 16 divisors (see below), whose sum is σ = 24251162844160. Its totient is φ = 18173686564800.

The previous prime is 21211200022189. The next prime is 21211200022217. The reversal of 21211200022201 is 10222000211212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21211200022201 - 2⁷ = 21211200022073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211200022231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182638051 + ... + 182754151.

It is an arithmetic number, because the mean of its divisors is an integer number (1515697677760).

Almost surely, 2^{21211200022201} is an apocalyptic number.

It is an amenable number.

21211200022201 is a deficient number, since it is larger than the sum of its proper divisors (3039962821959).

21211200022201 is a wasteful number, since it uses less digits than its factorization.

21211200022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126424.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211200022201 its reverse (10222000211212), we get a palindrome (31433200233413).

The spelling of 21211200022201 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, twenty-two thousand, two hundred one".