111121000121012 has 24 divisors (see below), whose sum is σ = 222280271963904. Its totient is φ = 47615084682912.

The previous prime is 111121000120987. The next prime is 111121000121057. The reversal of 111121000121012 is 210121000121111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 341546303 + ... + 341871494.

It is an arithmetic number, because the mean of its divisors is an integer number (9261677998496).

Almost surely, 2^{111121000121012} is an apocalyptic number.

It is an amenable number.

111121000121012 is an abundant number, since it is smaller than the sum of its proper divisors (111159271842892).

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

111121000121012 is a wasteful number, since it uses less digits than its factorization.

111121000121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683423615 (or 683423613 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111121000121012 its reverse (210121000121111), we get a palindrome (321242000242123).

Subtracting 111121000121012 from its reverse (210121000121111), we obtain a palindrome (99000000000099).

The spelling of 111121000121012 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-one thousand, twelve".