1221220201027 has 2 divisors, whose sum is σ = 1221220201028. Its totient is φ = 1221220201026.

The previous prime is 1221220200983. The next prime is 1221220201057. The reversal of 1221220201027 is 7201020221221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221220201027 - 2³⁵ = 1186860462659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221220200989 and 1221220201007.

It is not a weakly prime, because it can be changed into another prime (1221220201057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610610100513 + 610610100514.

It is an arithmetic number, because the mean of its divisors is an integer number (610610100514).

Almost surely, 2^{1221220201027} is an apocalyptic number.

1221220201027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221220201027 is an equidigital number, since it uses as much as digits as its factorization.

1221220201027 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1221220201027 its reverse (7201020221221), we get a palindrome (8422240422248).

The spelling of 1221220201027 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, two hundred one thousand, twenty-seven".