121224145055 has 8 divisors (see below), whose sum is σ = 156658895232. Its totient is φ = 89519368608.

The previous prime is 121224144953. The next prime is 121224145067. The reversal of 121224145055 is 550541422121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121224145055 - 2²⁰ = 121223096479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932493359 + ... + 932493488.

It is an arithmetic number, because the mean of its divisors is an integer number (19582361904).

Almost surely, 2^121224145055 is an apocalyptic number.

121224145055 is a deficient number, since it is larger than the sum of its proper divisors (35434750177).

121224145055 is a wasteful number, since it uses less digits than its factorization.

121224145055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864986865.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 121224145055 its reverse (550541422121), we get a palindrome (671765567176).

The spelling of 121224145055 in words is "one hundred twenty-one billion, two hundred twenty-four million, one hundred forty-five thousand, fifty-five".