20102022121 has 2 divisors, whose sum is σ = 20102022122. Its totient is φ = 20102022120.

The previous prime is 20102022119. The next prime is 20102022139. The reversal of 20102022121 is 12122020102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17187210000 + 2914812121 = 131100^2 + 53989^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102022121 - 2¹ = 20102022119 is a prime.

Together with 20102022119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20102122121) 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, 10051011060 + 10051011061.

It is an arithmetic number, because the mean of its divisors is an integer number (10051011061).

Almost surely, 2^20102022121 is an apocalyptic number.

It is an amenable number.

20102022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102022121 is an equidigital number, since it uses as much as digits as its factorization.

20102022121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20102022121 its reverse (12122020102), we get a palindrome (32224042223).

The spelling of 20102022121 in words is "twenty billion, one hundred two million, twenty-two thousand, one hundred twenty-one".