21222102212101 has 16 divisors (see below), whose sum is σ = 25680851521920. Its totient is φ = 17120135047680.

The previous prime is 21222102212099. The next prime is 21222102212249. The reversal of 21222102212101 is 10121220122212.

It is not a de Polignac number, because 21222102212101 - 2¹ = 21222102212099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222102213101) 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, 8688961 + ... + 10860121.

It is an arithmetic number, because the mean of its divisors is an integer number (1605053220120).

Almost surely, 2^{21222102212101} is an apocalyptic number.

It is an amenable number.

21222102212101 is a deficient number, since it is larger than the sum of its proper divisors (4458749309819).

21222102212101 is a wasteful number, since it uses less digits than its factorization.

21222102212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253324.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222102212101 its reverse (10121220122212), we get a palindrome (31343322334313).

The spelling of 21222102212101 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, two hundred twelve thousand, one hundred one".