121404060128 has 48 divisors (see below), whose sum is σ = 257511514176. Its totient is φ = 56008358400.

The previous prime is 121404060121. The next prime is 121404060137. The reversal of 121404060128 is 821060404121.

121404060128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 121404060128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404060121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915950 + ... + 1040082.

It is an arithmetic number, because the mean of its divisors is an integer number (5364823212).

Almost surely, 2^121404060128 is an apocalyptic number.

It is an amenable number.

121404060128 is an abundant number, since it is smaller than the sum of its proper divisors (136107454048).

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

121404060128 is a wasteful number, since it uses less digits than its factorization.

121404060128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126507 (or 126499 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

Adding to 121404060128 its reverse (821060404121), we get a palindrome (942464464249).

The spelling of 121404060128 in words is "one hundred twenty-one billion, four hundred four million, sixty thousand, one hundred twenty-eight".