121212121212300 has 144 divisors (see below), whose sum is σ = 365150426939424. Its totient is φ = 31017895680000.

The previous prime is 121212121212263. The next prime is 121212121212307. The reversal of 121212121212300 is 3212121212121.

It is not an unprimeable number, because it can be changed into a prime (121212121212307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80025471 + ... + 81526070.

It is an arithmetic number, because the mean of its divisors is an integer number (2535766853746).

Almost surely, 2^{121212121212300} is an apocalyptic number.

121212121212300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212121212300 is an abundant number, since it is smaller than the sum of its proper divisors (243938305727124).

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

121212121212300 is a wasteful number, since it uses less digits than its factorization.

121212121212300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161551660 (or 161551653 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121212121212300 its reverse (3212121212121), we get a palindrome (124424242424421).

The spelling of 121212121212300 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, three hundred".