1121503503120 has 640 divisors, whose sum is σ = 4675020779520. Its totient is φ = 214788464640.

The previous prime is 1121503503091. The next prime is 1121503503163. The reversal of 1121503503120 is 213053051211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 177534202 + ... + 177540518.

It is an arithmetic number, because the mean of its divisors is an integer number (7304719968).

Almost surely, 2^{1121503503120} is an apocalyptic number.

1121503503120 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 1121503503120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2337510389760).

1121503503120 is an abundant number, since it is smaller than the sum of its proper divisors (3553517276400).

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

1121503503120 is a wasteful number, since it uses less digits than its factorization.

1121503503120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103 (or 7097 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 1121503503120 its reverse (213053051211), we get a palindrome (1334556554331).

The spelling of 1121503503120 in words is "one trillion, one hundred twenty-one billion, five hundred three million, five hundred three thousand, one hundred twenty".