121111216124 has 24 divisors (see below), whose sum is σ = 213206448000. Its totient is φ = 60195651120.

The previous prime is 121111216123. The next prime is 121111216147. The reversal of 121111216124 is 421612111121.

It is a self number, because there is not a number n which added to its sum of digits gives 121111216124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111216123) by changing a digit.

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, 798707 + ... + 938165.

It is an arithmetic number, because the mean of its divisors is an integer number (8883602000).

Almost surely, 2^121111216124 is an apocalyptic number.

It is an amenable number.

121111216124 is a deficient number, since it is larger than the sum of its proper divisors (92095231876).

121111216124 is a wasteful number, since it uses less digits than its factorization.

121111216124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140753 (or 140751 counting only the distinct ones).

The product of its digits is 192, while the sum is 23.

Adding to 121111216124 its reverse (421612111121), we get a palindrome (542723327245).

The spelling of 121111216124 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred sixteen thousand, one hundred twenty-four".