1212121024200 has 432 divisors, whose sum is σ = 4228795539540. Its totient is φ = 311130086400.

The previous prime is 1212121024199. The next prime is 1212121024211. The reversal of 1212121024200 is 24201212121.

1212121024200 is a `hidden beast` number, since 1 + 21 + 212 + 10 + 2 + 420 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 564382572516 + 647738451684 = 751254^2 + 804822^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 340768822 + ... + 340772378.

Almost surely, 2^{1212121024200} is an apocalyptic number.

1212121024200 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 1212121024200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114397769770).

1212121024200 is an abundant number, since it is smaller than the sum of its proper divisors (3016674515340).

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

1212121024200 is a wasteful number, since it uses less digits than its factorization.

1212121024200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838 (or 3795 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212121024200 its reverse (24201212121), we get a palindrome (1236322236321).

The spelling of 1212121024200 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, twenty-four thousand, two hundred".