21212200220101 has 8 divisors (see below), whose sum is σ = 24146694321984. Its totient is φ = 18445391495520.

The previous prime is 21212200220093. The next prime is 21212200220173. The reversal of 21212200220101 is 10102200221212.

It is a happy number.

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

It is not a de Polignac number, because 21212200220101 - 2³ = 21212200220093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212200220191) 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 7 ways as a sum of consecutive naturals, for example, 41921344056 + ... + 41921344561.

It is an arithmetic number, because the mean of its divisors is an integer number (3018336790248).

Almost surely, 2^{21212200220101} is an apocalyptic number.

It is an amenable number.

21212200220101 is a deficient number, since it is larger than the sum of its proper divisors (2934494101883).

21212200220101 is a wasteful number, since it uses less digits than its factorization.

21212200220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83842688651.

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

Adding to 21212200220101 its reverse (10102200221212), we get a palindrome (31314400441313).

The spelling of 21212200220101 in words is "twenty-one trillion, two hundred twelve billion, two hundred million, two hundred twenty thousand, one hundred one".