200221011221221 has 2 divisors, whose sum is σ = 200221011221222. Its totient is φ = 200221011221220.

The previous prime is 200221011221207. The next prime is 200221011221237. The reversal of 200221011221221 is 122122110122002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191344419252900 + 8876591968321 = 13832730^2 + 2979361^2 .

It is a cyclic number.

It is not a de Polignac number, because 200221011221221 - 2⁹ = 200221011220709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200221011221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110505610610 + 100110505610611.

It is an arithmetic number, because the mean of its divisors is an integer number (100110505610611).

Almost surely, 2^{200221011221221} is an apocalyptic number.

It is an amenable number.

200221011221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200221011221221 is an equidigital number, since it uses as much as digits as its factorization.

200221011221221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 200221011221221 its reverse (122122110122002), we get a palindrome (322343121343223).

The spelling of 200221011221221 in words is "two hundred trillion, two hundred twenty-one billion, eleven million, two hundred twenty-one thousand, two hundred twenty-one".