1121010009 has 24 divisors (see below), whose sum is σ = 1727494848. Its totient is φ = 633362400.

The previous prime is 1121009999. The next prime is 1121010061. The reversal of 1121010009 is 9000101211.

It is not a de Polignac number, because 1121010009 - 2⁹ = 1121009497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121010009.

It is not an unprimeable number, because it can be changed into a prime (1121010509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1541604 + ... + 1542330.

It is an arithmetic number, because the mean of its divisors is an integer number (71978952).

Almost surely, 2^1121010009 is an apocalyptic number.

It is an amenable number.

1121010009 is a deficient number, since it is larger than the sum of its proper divisors (606484839).

1121010009 is an frugal number, since it uses more digits than its factorization.

1121010009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1121010009 is about 33481.4875565588. The cubic root of 1121010009 is about 1038.8108971612.

The spelling of 1121010009 in words is "one billion, one hundred twenty-one million, ten thousand, nine".