20302002121 has 2 divisors, whose sum is σ = 20302002122. Its totient is φ = 20302002120.

The previous prime is 20302002109. The next prime is 20302002137. The reversal of 20302002121 is 12120020302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20301975225 + 26896 = 142485^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302002121 - 2²³ = 20293613513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20302002101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151001060 + 10151001061.

It is an arithmetic number, because the mean of its divisors is an integer number (10151001061).

Almost surely, 2^20302002121 is an apocalyptic number.

It is an amenable number.

20302002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302002121 is an equidigital number, since it uses as much as digits as its factorization.

20302002121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20302002121 its reverse (12120020302), we get a palindrome (32422022423).

The spelling of 20302002121 in words is "twenty billion, three hundred two million, two thousand, one hundred twenty-one".