121423324128 has 48 divisors (see below), whose sum is σ = 322576442496. Its totient is φ = 39986794880.

The previous prime is 121423324097. The next prime is 121423324129. The reversal of 121423324128 is 821423324121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423324129) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7611468 + ... + 7627403.

It is an arithmetic number, because the mean of its divisors is an integer number (6720342552).

Almost surely, 2^121423324128 is an apocalyptic number.

It is an amenable number.

121423324128 is an abundant number, since it is smaller than the sum of its proper divisors (201153118368).

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

121423324128 is a wasteful number, since it uses less digits than its factorization.

121423324128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15238967 (or 15238959 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

Adding to 121423324128 its reverse (821423324121), we get a palindrome (942846648249).

The spelling of 121423324128 in words is "one hundred twenty-one billion, four hundred twenty-three million, three hundred twenty-four thousand, one hundred twenty-eight".