12121111020012 has 12 divisors (see below), whose sum is σ = 28282592380056. Its totient is φ = 4040370340000.

The previous prime is 12121111019981. The next prime is 12121111020017. The reversal of 12121111020012 is 21002011112121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12121111019973 and 12121111020000.

It is not an unprimeable number, because it can be changed into a prime (12121111020017) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 505046292489 + ... + 505046292512.

It is an arithmetic number, because the mean of its divisors is an integer number (2356882698338).

Almost surely, 2^{12121111020012} is an apocalyptic number.

12121111020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121111020012 is an abundant number, since it is smaller than the sum of its proper divisors (16161481360044).

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

12121111020012 is a wasteful number, since it uses less digits than its factorization.

12121111020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010092585008 (or 1010092585006 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12121111020012 its reverse (21002011112121), we get a palindrome (33123122132133).

The spelling of 12121111020012 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twenty thousand, twelve".