200220221221 has 2 divisors, whose sum is σ = 200220221222. Its totient is φ = 200220221220.

The previous prime is 200220221183. The next prime is 200220221233. The reversal of 200220221221 is 122122022002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150408230625 + 49811990596 = 387825^2 + 223186^2 .

It is a cyclic number.

It is not a de Polignac number, because 200220221221 - 2¹⁹ = 200219696933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200220221195 and 200220221204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200220221021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110110610 + 100110110611.

It is an arithmetic number, because the mean of its divisors is an integer number (100110110611).

Almost surely, 2^200220221221 is an apocalyptic number.

It is an amenable number.

200220221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200220221221 is an equidigital number, since it uses as much as digits as its factorization.

200220221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 200220221221 its reverse (122122022002), we get a palindrome (322342243223).

The spelling of 200220221221 in words is "two hundred billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".