1121204043240 has 256 divisors, whose sum is σ = 3572269516800. Its totient is φ = 280910767104.

The previous prime is 1121204043209. The next prime is 1121204043251. The reversal of 1121204043240 is 423404021211.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1121204043240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 290993154 + ... + 290997006.

It is an arithmetic number, because the mean of its divisors is an integer number (13954177800).

Almost surely, 2^{1121204043240} is an apocalyptic number.

1121204043240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121204043240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1786134758400).

1121204043240 is an abundant number, since it is smaller than the sum of its proper divisors (2451065473560).

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

1121204043240 is a wasteful number, since it uses less digits than its factorization.

1121204043240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736 (or 5732 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1121204043240 its reverse (423404021211), we get a palindrome (1544608064451).

The spelling of 1121204043240 in words is "one trillion, one hundred twenty-one billion, two hundred four million, forty-three thousand, two hundred forty".