1000001221027 has 2 divisors, whose sum is σ = 1000001221028. Its totient is φ = 1000001221026.

The previous prime is 1000001221001. The next prime is 1000001221039. The reversal of 1000001221027 is 7201221000001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000001221027 - 2⁷ = 1000001220899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000001221027.

It is not a weakly prime, because it can be changed into another prime (1000001221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000610513 + 500000610514.

It is an arithmetic number, because the mean of its divisors is an integer number (500000610514).

Almost surely, 2^{1000001221027} is an apocalyptic number.

1000001221027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000001221027 is an equidigital number, since it uses as much as digits as its factorization.

1000001221027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 1000001221027 its reverse (7201221000001), we get a palindrome (8201222221028).

The spelling of 1000001221027 in words is "one trillion, one million, two hundred twenty-one thousand, twenty-seven".