201221221027 has 2 divisors, whose sum is σ = 201221221028. Its totient is φ = 201221221026.

The previous prime is 201221221009. The next prime is 201221221073. The reversal of 201221221027 is 720122122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201221221027 - 2⁷ = 201221220899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201221220989 and 201221221007.

It is not a weakly prime, because it can be changed into another prime (201221921027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610610513 + 100610610514.

It is an arithmetic number, because the mean of its divisors is an integer number (100610610514).

Almost surely, 2^201221221027 is an apocalyptic number.

201221221027 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221221027 is an equidigital number, since it uses as much as digits as its factorization.

201221221027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 201221221027 its reverse (720122122102), we get a palindrome (921343343129).

The spelling of 201221221027 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-seven".