20202200002121 has 2 divisors, whose sum is σ = 20202200002122. Its totient is φ = 20202200002120.

The previous prime is 20202200002109. The next prime is 20202200002151. The reversal of 20202200002121 is 12120000220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20077210177600 + 124989824521 = 4480760^2 + 353539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202200002121 - 2¹⁸ = 20202199739977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202200002096 and 20202200002105.

It is not a weakly prime, because it can be changed into another prime (20202200002151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101100001060 + 10101100001061.

It is an arithmetic number, because the mean of its divisors is an integer number (10101100001061).

Almost surely, 2^{20202200002121} is an apocalyptic number.

It is an amenable number.

20202200002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202200002121 is an equidigital number, since it uses as much as digits as its factorization.

20202200002121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20202200002121 its reverse (12120000220202), we get a palindrome (32322200222323).

The spelling of 20202200002121 in words is "twenty trillion, two hundred two billion, two hundred million, two thousand, one hundred twenty-one".