1021000027 has 2 divisors, whose sum is σ = 1021000028. Its totient is φ = 1021000026.

The previous prime is 1021000009. The next prime is 1021000039. The reversal of 1021000027 is 7200001201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021000027 - 2¹⁹ = 1020475739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020999980 and 1021000016.

It is not a weakly prime, because it can be changed into another prime (1021000007) 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, 510500013 + 510500014.

It is an arithmetic number, because the mean of its divisors is an integer number (510500014).

Almost surely, 2^1021000027 is an apocalyptic number.

1021000027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021000027 is an equidigital number, since it uses as much as digits as its factorization.

1021000027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 1021000027 is about 31953.0910398353. The cubic root of 1021000027 is about 1006.9515726608.

Adding to 1021000027 its reverse (7200001201), we get a palindrome (8221001228).

The spelling of 1021000027 in words is "one billion, twenty-one million, twenty-seven", and thus it is an aban number and an uban number.