22020421231 has 2 divisors, whose sum is σ = 22020421232. Its totient is φ = 22020421230.

The previous prime is 22020421193. The next prime is 22020421253. The reversal of 22020421231 is 13212402022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22020421231 - 2¹³ = 22020413039 is a prime.

It is a super-2 number, since 2×22020421231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22020421199 and 22020421208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22020421831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010210615 + 11010210616.

It is an arithmetic number, because the mean of its divisors is an integer number (11010210616).

Almost surely, 2^22020421231 is an apocalyptic number.

22020421231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020421231 is an equidigital number, since it uses as much as digits as its factorization.

22020421231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22020421231 its reverse (13212402022), we get a palindrome (35232823253).

The spelling of 22020421231 in words is "twenty-two billion, twenty million, four hundred twenty-one thousand, two hundred thirty-one".