12121111121012 has 12 divisors (see below), whose sum is σ = 21257957359716. Its totient is φ = 6047409018240.

The previous prime is 12121111120973. The next prime is 12121111121047. The reversal of 12121111121012 is 21012111112121.

It can be written as a sum of positive squares in 2 ways, for example, as 4503919595536 + 7617191525476 = 2122244^2 + 2759926^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286633493 + ... + 3286637180.

It is an arithmetic number, because the mean of its divisors is an integer number (1771496446643).

Almost surely, 2^{12121111121012} is an apocalyptic number.

It is an amenable number.

12121111121012 is a deficient number, since it is larger than the sum of its proper divisors (9136846238704).

12121111121012 is a wasteful number, since it uses less digits than its factorization.

12121111121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6573271138 (or 6573271136 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12121111121012 its reverse (21012111112121), we get a palindrome (33133222233133).

The spelling of 12121111121012 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, twelve".