1122121121200 has 60 divisors (see below), whose sum is σ = 2699384313168. Its totient is φ = 448267667200.

The previous prime is 1122121121047. The next prime is 1122121121207. The reversal of 1122121121200 is 21211212211.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1122121121207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1505356 + ... + 2123755.

Almost surely, 2^{1122121121200} is an apocalyptic number.

1122121121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122121121200 is an abundant number, since it is smaller than the sum of its proper divisors (1577263191968).

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

1122121121200 is a wasteful number, since it uses less digits than its factorization.

1122121121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629902 (or 3629891 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1122121121200 its reverse (21211212211), we get a palindrome (1143332333411).

The spelling of 1122121121200 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred".