21222202210101 has 20 divisors (see below), whose sum is σ = 31702911511392. Its totient is φ = 14147862823368.

The previous prime is 21222202210081. The next prime is 21222202210103. The reversal of 21222202210101 is 10101220222212.

It is a happy number.

21222202210101 is a `hidden beast` number, since 2 + 122 + 220 + 221 + 0 + 101 = 666.

It is not a de Polignac number, because 21222202210101 - 2¹⁰ = 21222202209077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222202210103) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1765846 + ... + 6750008.

Almost surely, 2^{21222202210101} is an apocalyptic number.

It is an amenable number.

21222202210101 is a deficient number, since it is larger than the sum of its proper divisors (10480709301291).

21222202210101 is an equidigital number, since it uses as much as digits as its factorization.

21222202210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036742 (or 5036733 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222202210101 its reverse (10101220222212), we get a palindrome (31323422432313).

The spelling of 21222202210101 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred two million, two hundred ten thousand, one hundred one".