1121580548209 has 27 divisors (see below), whose sum is σ = 1262712423609. Its totient is φ = 995461818120.

The previous prime is 1121580548183. The next prime is 1121580548213. The reversal of 1121580548209 is 9028450851211.

The square root of 1121580548209 is 1059047.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1121580548209 - 2¹⁷ = 1121580417137 is a prime.

It is a super-2 number, since 2×1121580548209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121580546209) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 500928112 + ... + 500930350.

Almost surely, 2^{1121580548209} is an apocalyptic number.

1121580548209 is the 1059047-th square number.

1121580548209 is the 529524-th centered octagonal number.

It is an amenable number.

1121580548209 is a deficient number, since it is larger than the sum of its proper divisors (141131875400).

1121580548209 is an frugal number, since it uses more digits than its factorization.

1121580548209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586 (or 2293 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 46.

The spelling of 1121580548209 in words is "one trillion, one hundred twenty-one billion, five hundred eighty million, five hundred forty-eight thousand, two hundred nine".