121312512204 has 144 divisors (see below), whose sum is σ = 317533255200. Its totient is φ = 35988406272.

The previous prime is 121312512163. The next prime is 121312512229. The reversal of 121312512204 is 402215213121.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 67809342 + ... + 67811130.

It is an arithmetic number, because the mean of its divisors is an integer number (2205092050).

Almost surely, 2^121312512204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121312512204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158766627600).

121312512204 is an abundant number, since it is smaller than the sum of its proper divisors (196220742996).

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

121312512204 is a wasteful number, since it uses less digits than its factorization.

121312512204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 121312512204 its reverse (402215213121), we get a palindrome (523527725325).

The spelling of 121312512204 in words is "one hundred twenty-one billion, three hundred twelve million, five hundred twelve thousand, two hundred four".