1111121212200 has 96 divisors (see below), whose sum is σ = 3625763992800. Its totient is φ = 280704303360.

The previous prime is 1111121212189. The next prime is 1111121212237. The reversal of 1111121212200 is 22121211111.

It is a happy number.

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 1111121212200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48721987 + ... + 48744786.

It is an arithmetic number, because the mean of its divisors is an integer number (37768374925).

Almost surely, 2^{1111121212200} is an apocalyptic number.

1111121212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111121212200 is an abundant number, since it is smaller than the sum of its proper divisors (2514642780600).

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

1111121212200 is a wasteful number, since it uses less digits than its factorization.

1111121212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97466811 (or 97466802 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111121212200 its reverse (22121211111), we get a palindrome (1133242423311).

The spelling of 1111121212200 in words is "one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, two hundred".