200212120121021 has 2 divisors, whose sum is σ = 200212120121022. Its totient is φ = 200212120121020.

The previous prime is 200212120120879. The next prime is 200212120121023. The reversal of 200212120121021 is 120121021212002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142952177100121 + 57259943020900 = 11956261^2 + 7567030^2 .

It is a cyclic number.

It is not a de Polignac number, because 200212120121021 - 2¹⁴ = 200212120104637 is a prime.

Together with 200212120121023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200212120121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100106060060510 + 100106060060511.

It is an arithmetic number, because the mean of its divisors is an integer number (100106060060511).

Almost surely, 2^{200212120121021} is an apocalyptic number.

It is an amenable number.

200212120121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200212120121021 is an equidigital number, since it uses as much as digits as its factorization.

200212120121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200212120121021 its reverse (120121021212002), we get a palindrome (320333141333023).

The spelling of 200212120121021 in words is "two hundred trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".