121212131202312 has 64 divisors (see below), whose sum is σ = 304060274798400. Its totient is φ = 40266809425920.

The previous prime is 121212131202289. The next prime is 121212131202329. The reversal of 121212131202312 is 213202131212121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18235864 + ... + 23978552.

It is an arithmetic number, because the mean of its divisors is an integer number (4750941793725).

Almost surely, 2^{121212131202312} is an apocalyptic number.

121212131202312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121212131202312 is an abundant number, since it is smaller than the sum of its proper divisors (182848143596088).

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

121212131202312 is a wasteful number, since it uses less digits than its factorization.

121212131202312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745686 (or 5745682 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 121212131202312 its reverse (213202131212121), we get a palindrome (334414262414433).

The spelling of 121212131202312 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred thirty-one million, two hundred two thousand, three hundred twelve".