20021222230243 has 16 divisors (see below), whose sum is σ = 21574324769536. Its totient is φ = 18469980650880.

The previous prime is 20021222230241. The next prime is 20021222230267. The reversal of 20021222230243 is 34203222212002.

It is a cyclic number.

It is not a de Polignac number, because 20021222230243 - 2¹ = 20021222230241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021222230241) 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, 201974830 + ... + 202073932.

It is an arithmetic number, because the mean of its divisors is an integer number (1348395298096).

Almost surely, 2^{20021222230243} is an apocalyptic number.

20021222230243 is a deficient number, since it is larger than the sum of its proper divisors (1553102539293).

20021222230243 is a wasteful number, since it uses less digits than its factorization.

20021222230243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108334.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20021222230243 its reverse (34203222212002), we get a palindrome (54224444442245).

The spelling of 20021222230243 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, two hundred thirty thousand, two hundred forty-three".