1121242309 has 16 divisors (see below), whose sum is σ = 1239422400. Its totient is φ = 1005840000.

The previous prime is 1121242289. The next prime is 1121242333. The reversal of 1121242309 is 9032421211.

It is not a de Polignac number, because 1121242309 - 2⁵ = 1121242277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121242349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366217 + ... + 369265.

It is an arithmetic number, because the mean of its divisors is an integer number (77463900).

Almost surely, 2^1121242309 is an apocalyptic number.

It is an amenable number.

1121242309 is a deficient number, since it is larger than the sum of its proper divisors (118180091).

1121242309 is a wasteful number, since it uses less digits than its factorization.

1121242309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1121242309 is about 33484.9564580873. The cubic root of 1121242309 is about 1038.8826476668.

It can be divided in two parts, 112 and 1242309, that added together give a palindrome (1242421).

The spelling of 1121242309 in words is "one billion, one hundred twenty-one million, two hundred forty-two thousand, three hundred nine".