121211010112200 has 96 divisors (see below), whose sum is σ = 376098545964960. Its totient is φ = 32293308966400.

The previous prime is 121211010112163. The next prime is 121211010112253. The reversal of 121211010112200 is 2211010112121.

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 121211010112200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91929429 + ... + 93238628.

It is an arithmetic number, because the mean of its divisors is an integer number (3917693187135).

Almost surely, 2^{121211010112200} is an apocalyptic number.

121211010112200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211010112200 is an abundant number, since it is smaller than the sum of its proper divisors (254887535852760).

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

121211010112200 is a wasteful number, since it uses less digits than its factorization.

121211010112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185169167 (or 185169158 counting only the distinct ones).

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

Adding to 121211010112200 its reverse (2211010112121), we get a palindrome (123422020224321).

The spelling of 121211010112200 in words is "one hundred twenty-one trillion, two hundred eleven billion, ten million, one hundred twelve thousand, two hundred".