12121111020000 has 240 divisors, whose sum is σ = 39779971296912. Its totient is φ = 3230645760000.

The previous prime is 12121111019981. The next prime is 12121111020017. The reversal of 12121111020000 is 2011112121.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 119769420 + ... + 119870580.

Almost surely, 2^{12121111020000} is an apocalyptic number.

12121111020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121111020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19889985648456).

12121111020000 is an abundant number, since it is smaller than the sum of its proper divisors (27658860276912).

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

12121111020000 is a wasteful number, since it uses less digits than its factorization.

12121111020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103191 (or 103168 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121111020000 its reverse (2011112121), we get a palindrome (12123122132121).

The spelling of 12121111020000 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twenty thousand".