121125055104 has 128 divisors (see below), whose sum is σ = 365093740800. Its totient is φ = 39515922432.

The previous prime is 121125055099. The next prime is 121125055169. The reversal of 121125055104 is 401550521121.

It is a happy number.

121125055104 is a `hidden beast` number, since 1 + 21 + 125 + 0 + 5 + 510 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210417 + ... + 535280.

It is an arithmetic number, because the mean of its divisors is an integer number (2852294850).

Almost surely, 2^121125055104 is an apocalyptic number.

It is an amenable number.

121125055104 is an abundant number, since it is smaller than the sum of its proper divisors (243968685696).

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

121125055104 is an equidigital number, since it uses as much as digits as its factorization.

121125055104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745767 (or 745749 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 121125055104 its reverse (401550521121), we get a palindrome (522675576225).

The spelling of 121125055104 in words is "one hundred twenty-one billion, one hundred twenty-five million, fifty-five thousand, one hundred four".