20021222202101 has 16 divisors (see below), whose sum is σ = 20404438262208. Its totient is φ = 19641200630400.

The previous prime is 20021222202017. The next prime is 20021222202119. The reversal of 20021222202101 is 10120222212002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20021222202101 - 2¹⁰ = 20021222201077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021222202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222222101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10679186 + ... + 12413196.

It is an arithmetic number, because the mean of its divisors is an integer number (1275277391388).

Almost surely, 2^{20021222202101} is an apocalyptic number.

It is an amenable number.

20021222202101 is a deficient number, since it is larger than the sum of its proper divisors (383216060107).

20021222202101 is a wasteful number, since it uses less digits than its factorization.

20021222202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734932.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20021222202101 its reverse (10120222212002), we get a palindrome (30141444414103).

Subtracting from 20021222202101 its reverse (10120222212002), we obtain a palindrome (9900999990099).

The spelling of 20021222202101 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred one".