1121431340 has 12 divisors (see below), whose sum is σ = 2355005856. Its totient is φ = 448572528.

The previous prime is 1121431331. The next prime is 1121431393. The reversal of 1121431340 is 431341211.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 56071567 = 1121431340 / (1 + 1 + 2 + 1 + 4 + 3 + 1 + 3 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28035764 + ... + 28035803.

It is an arithmetic number, because the mean of its divisors is an integer number (196250488).

Almost surely, 2^1121431340 is an apocalyptic number.

1121431340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121431340 is an abundant number, since it is smaller than the sum of its proper divisors (1233574516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121431340 is a wasteful number, since it uses less digits than its factorization.

1121431340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56071576 (or 56071574 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1121431340 is about 33487.7789648702. The cubic root of 1121431340 is about 1038.9410263625.

Adding to 1121431340 its reverse (431341211), we get a palindrome (1552772551).

The spelling of 1121431340 in words is "one billion, one hundred twenty-one million, four hundred thirty-one thousand, three hundred forty".