1009521011 has 2 divisors, whose sum is σ = 1009521012. Its totient is φ = 1009521010.

The previous prime is 1009520971. The next prime is 1009521043. The reversal of 1009521011 is 1101259001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1009521011 - 2¹⁴ = 1009504627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1009527011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504760505 + 504760506.

It is an arithmetic number, because the mean of its divisors is an integer number (504760506).

Almost surely, 2^1009521011 is an apocalyptic number.

1009521011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009521011 is an equidigital number, since it uses as much as digits as its factorization.

1009521011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1009521011 is about 31772.9603751366. The cubic root of 1009521011 is about 1003.1636510904.

The spelling of 1009521011 in words is "one billion, nine million, five hundred twenty-one thousand, eleven".