20221002222181 has 2 divisors, whose sum is σ = 20221002222182. Its totient is φ = 20221002222180.

The previous prime is 20221002222173. The next prime is 20221002222221. The reversal of 20221002222181 is 18122220012202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14604855856900 + 5616146365281 = 3821630^2 + 2369841^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221002222181 - 2³ = 20221002222173 is a prime.

It is a super-2 number, since 2×20221002222181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221002226181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110501111090 + 10110501111091.

It is an arithmetic number, because the mean of its divisors is an integer number (10110501111091).

Almost surely, 2^{20221002222181} is an apocalyptic number.

It is an amenable number.

20221002222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221002222181 is an equidigital number, since it uses as much as digits as its factorization.

20221002222181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 20221002222181 its reverse (18122220012202), we get a palindrome (38343222234383).

The spelling of 20221002222181 in words is "twenty trillion, two hundred twenty-one billion, two million, two hundred twenty-two thousand, one hundred eighty-one".