1111521009 has 8 divisors (see below), whose sum is σ = 1482412672. Its totient is φ = 740821680.

The previous prime is 1111521007. The next prime is 1111521011. The reversal of 1111521009 is 9001251111.

It is an interprime number because it is at equal distance from previous prime (1111521007) and next prime (1111521011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1111521009 - 2¹ = 1111521007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111521007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34009 + ... + 58134.

It is an arithmetic number, because the mean of its divisors is an integer number (185301584).

Almost surely, 2^1111521009 is an apocalyptic number.

It is an amenable number.

1111521009 is a deficient number, since it is larger than the sum of its proper divisors (370891663).

1111521009 is an equidigital number, since it uses as much as digits as its factorization.

1111521009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96167.

The product of its (nonzero) digits is 90, while the sum is 21.

The square root of 1111521009 is about 33339.4812347163. The cubic root of 1111521009 is about 1035.8715177970.

The spelling of 1111521009 in words is "one billion, one hundred eleven million, five hundred twenty-one thousand, nine".