20121212119984 has 20 divisors (see below), whose sum is σ = 39422880490680. Its totient is φ = 9947565541760.

The previous prime is 20121212119969. The next prime is 20121212119993. The reversal of 20121212119984 is 48991121212102.

It is a happy number.

It is a super-2 number, since 2×20121212119984² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20121212119984.

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 3 ways as a sum of consecutive naturals, for example, 7065030922 + ... + 7065033769.

It is an arithmetic number, because the mean of its divisors is an integer number (1971144024534).

Almost surely, 2^{20121212119984} is an apocalyptic number.

It is an amenable number.

20121212119984 is a deficient number, since it is larger than the sum of its proper divisors (19301668370696).

20121212119984 is a wasteful number, since it uses less digits than its factorization.

20121212119984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14130064788 (or 14130064782 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The spelling of 20121212119984 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, one hundred nineteen thousand, nine hundred eighty-four".