1122112500 has 144 divisors (see below), whose sum is σ = 3417531264. Its totient is φ = 286000000.

The previous prime is 1122112499. The next prime is 1122112553. The reversal of 1122112500 is 52112211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1122112500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 861850 + ... + 863150.

It is an arithmetic number, because the mean of its divisors is an integer number (23732856).

Almost surely, 2^1122112500 is an apocalyptic number.

1122112500 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 1122112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1708765632).

1122112500 is an abundant number, since it is smaller than the sum of its proper divisors (2295418764).

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

1122112500 is a wasteful number, since it uses less digits than its factorization.

1122112500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1122112500 is about 33497.9476983292. The cubic root of 1122112500 is about 1039.1513355181.

Adding to 1122112500 its reverse (52112211), we get a palindrome (1174224711).

The spelling of 1122112500 in words is "one billion, one hundred twenty-two million, one hundred twelve thousand, five hundred".