200222201021221 has 2 divisors, whose sum is σ = 200222201021222. Its totient is φ = 200222201021220.

The previous prime is 200222201021173. The next prime is 200222201021279. The reversal of 200222201021221 is 122120102222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196721971629121 + 3500229392100 = 14025761^2 + 1870890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200222201021221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200222201025221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100111100510610 + 100111100510611.

It is an arithmetic number, because the mean of its divisors is an integer number (100111100510611).

Almost surely, 2^{200222201021221} is an apocalyptic number.

It is an amenable number.

200222201021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200222201021221 is an equidigital number, since it uses as much as digits as its factorization.

200222201021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 200222201021221 its reverse (122120102222002), we get a palindrome (322342303243223).

The spelling of 200222201021221 in words is "two hundred trillion, two hundred twenty-two billion, two hundred one million, twenty-one thousand, two hundred twenty-one".