1122512100 has 36 divisors (see below), whose sum is σ = 3247802544. Its totient is φ = 299336480.

The previous prime is 1122512089. The next prime is 1122512129. The reversal of 1122512100 is 12152211.

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 1122512100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1870554 + ... + 1871153.

Almost surely, 2^1122512100 is an apocalyptic number.

1122512100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122512100 is an abundant number, since it is smaller than the sum of its proper divisors (2125290444).

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

1122512100 is a wasteful number, since it uses less digits than its factorization.

1122512100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741724 (or 3741717 counting only the distinct ones).

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

The square root of 1122512100 is about 33503.9117119181. The cubic root of 1122512100 is about 1039.2746730005.

Adding to 1122512100 its reverse (12152211), we get a palindrome (1134664311).

The spelling of 1122512100 in words is "one billion, one hundred twenty-two million, five hundred twelve thousand, one hundred".