121212103200 has 72 divisors (see below), whose sum is σ = 394545403728. Its totient is φ = 32323226880.

The previous prime is 121212103183. The next prime is 121212103211. The reversal of 121212103200 is 2301212121.

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 121212103200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25250122 + ... + 25254921.

It is an arithmetic number, because the mean of its divisors is an integer number (5479797274).

Almost surely, 2^121212103200 is an apocalyptic number.

121212103200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212103200 is an abundant number, since it is smaller than the sum of its proper divisors (273333300528).

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

121212103200 is a wasteful number, since it uses less digits than its factorization.

121212103200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50505066 (or 50505053 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121212103200 its reverse (2301212121), we get a palindrome (123513315321).

The spelling of 121212103200 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred three thousand, two hundred".