200020101121021 has 2 divisors, whose sum is σ = 200020101121022. Its totient is φ = 200020101121020.

The previous prime is 200020101121013. The next prime is 200020101121051. The reversal of 200020101121021 is 120121101020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148664030441796 + 51356070679225 = 12192786^2 + 7166315^2 .

It is a cyclic number.

It is not a de Polignac number, because 200020101121021 - 2³ = 200020101121013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200020101120992 and 200020101121010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200020101121051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010050560510 + 100010050560511.

It is an arithmetic number, because the mean of its divisors is an integer number (100010050560511).

Almost surely, 2^{200020101121021} is an apocalyptic number.

It is an amenable number.

200020101121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020101121021 is an equidigital number, since it uses as much as digits as its factorization.

200020101121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200020101121021 its reverse (120121101020002), we get a palindrome (320141202141023).

The spelling of 200020101121021 in words is "two hundred trillion, twenty billion, one hundred one million, one hundred twenty-one thousand, twenty-one".