20222121021121 has 2 divisors, whose sum is σ = 20222121021122. Its totient is φ = 20222121021120.

The previous prime is 20222121021119. The next prime is 20222121021127. The reversal of 20222121021121 is 12112012122202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15462354128400 + 4759766892721 = 3932220^2 + 2181689^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222121021121 - 2¹ = 20222121021119 is a prime.

Together with 20222121021119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20222121021127) 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, 10111060510560 + 10111060510561.

It is an arithmetic number, because the mean of its divisors is an integer number (10111060510561).

Almost surely, 2^{20222121021121} is an apocalyptic number.

It is an amenable number.

20222121021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222121021121 is an equidigital number, since it uses as much as digits as its factorization.

20222121021121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20222121021121 its reverse (12112012122202), we get a palindrome (32334133143323).

The spelling of 20222121021121 in words is "twenty trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-one".