200101121021 has 2 divisors, whose sum is σ = 200101121022. Its totient is φ = 200101121020.

The previous prime is 200101120991. The next prime is 200101121023. The reversal of 200101121021 is 120121101002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105722522500 + 94378598521 = 325150^2 + 307211^2 .

It is a cyclic number.

It is not a de Polignac number, because 200101121021 - 2¹⁰ = 200101119997 is a prime.

Together with 200101121023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 200101120993 and 200101121011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200101121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100050560510 + 100050560511.

It is an arithmetic number, because the mean of its divisors is an integer number (100050560511).

Almost surely, 2^200101121021 is an apocalyptic number.

It is an amenable number.

200101121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200101121021 is an equidigital number, since it uses as much as digits as its factorization.

200101121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200101121021 its reverse (120121101002), we get a palindrome (320222222023).

The spelling of 200101121021 in words is "two hundred billion, one hundred one million, one hundred twenty-one thousand, twenty-one".