1121249485440 has 1920 divisors, whose sum is σ = 4984114291200. Its totient is φ = 238978252800.

The previous prime is 1121249485429. The next prime is 1121249485441. The reversal of 1121249485440 is 445849421211.

1121249485440 is a `hidden beast` number, since 1 + 1 + 2 + 12 + 4 + 94 + 8 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121249485441) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 2283603595 + ... + 2283604085.

It is an arithmetic number, because the mean of its divisors is an integer number (2595892860).

Almost surely, 2^{1121249485440} is an apocalyptic number.

1121249485440 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 1121249485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2492057145600).

1121249485440 is an abundant number, since it is smaller than the sum of its proper divisors (3862864805760).

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

1121249485440 is a wasteful number, since it uses less digits than its factorization.

1121249485440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 1121249485440 in words is "one trillion, one hundred twenty-one billion, two hundred forty-nine million, four hundred eighty-five thousand, four hundred forty".