1123121121200 has 60 divisors (see below), whose sum is σ = 2905859929728. Its totient is φ = 414690873600.

The previous prime is 1123121121181. The next prime is 1123121121217. The reversal of 1123121121200 is 21211213211.

It is a happy number.

It is a super-2 number, since 2×1123121121200² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107987216 + ... + 107997615.

Almost surely, 2^{1123121121200} is an apocalyptic number.

1123121121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123121121200 is an abundant number, since it is smaller than the sum of its proper divisors (1782738808528).

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

1123121121200 is a wasteful number, since it uses less digits than its factorization.

1123121121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215984862 (or 215984851 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1123121121200 its reverse (21211213211), we get a palindrome (1144332334411).

The spelling of 1123121121200 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred".