20021222010181 has 16 divisors (see below), whose sum is σ = 23061966520320. Its totient is φ = 17025624690480.

The previous prime is 20021222010161. The next prime is 20021222010191. The reversal of 20021222010181 is 18101022212002.

It is not a de Polignac number, because 20021222010181 - 2¹¹ = 20021222008133 is a prime.

It is a super-2 number, since 2×20021222010181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222010161) 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, 61989810 + ... + 62311948.

It is an arithmetic number, because the mean of its divisors is an integer number (1441372907520).

Almost surely, 2^{20021222010181} is an apocalyptic number.

It is an amenable number.

20021222010181 is a deficient number, since it is larger than the sum of its proper divisors (3040744510139).

20021222010181 is a wasteful number, since it uses less digits than its factorization.

20021222010181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392184.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 20021222010181 its reverse (18101022212002), we get a palindrome (38122244222183).

The spelling of 20021222010181 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, ten thousand, one hundred eighty-one".