121554324044 has 24 divisors (see below), whose sum is σ = 213979268160. Its totient is φ = 60417615824.

The previous prime is 121554323999. The next prime is 121554324077. The reversal of 121554324044 is 440423455121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121554323995 and 121554324013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2266847 + ... + 2319849.

It is an arithmetic number, because the mean of its divisors is an integer number (8915802840).

Almost surely, 2^121554324044 is an apocalyptic number.

It is an amenable number.

121554324044 is a deficient number, since it is larger than the sum of its proper divisors (92424944116).

121554324044 is a wasteful number, since it uses less digits than its factorization.

121554324044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56389 (or 56387 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 121554324044 its reverse (440423455121), we get a palindrome (561977779165).

The spelling of 121554324044 in words is "one hundred twenty-one billion, five hundred fifty-four million, three hundred twenty-four thousand, forty-four".