1121735209 has 16 divisors (see below), whose sum is σ = 1290150400. Its totient is φ = 955385280.

The previous prime is 1121735207. The next prime is 1121735213. The reversal of 1121735209 is 9025371211.

It is a cyclic number.

It is not a de Polignac number, because 1121735209 - 2¹ = 1121735207 is a prime.

It is a super-2 number, since 2×1121735209² = 2516579758220547362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121735207) 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 15 ways as a sum of consecutive naturals, for example, 910624 + ... + 911854.

It is an arithmetic number, because the mean of its divisors is an integer number (80634400).

Almost surely, 2^1121735209 is an apocalyptic number.

It is an amenable number.

1121735209 is a deficient number, since it is larger than the sum of its proper divisors (168415191).

1121735209 is a wasteful number, since it uses less digits than its factorization.

1121735209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1121735209 is about 33492.3156709117. The cubic root of 1121735209 is about 1039.0348568834.

The spelling of 1121735209 in words is "one billion, one hundred twenty-one million, seven hundred thirty-five thousand, two hundred nine".