121224554441 has 4 divisors (see below), whose sum is σ = 121225257492. Its totient is φ = 121223851392.

The previous prime is 121224554351. The next prime is 121224554557. The reversal of 121224554441 is 144455422121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 144455422121 = 23 ⋅6280670527.

It can be written as a sum of positive squares in 2 ways, for example, as 80143345216 + 41081209225 = 283096^2 + 202685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121224554441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121224554741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103121 + ... + 503073.

It is an arithmetic number, because the mean of its divisors is an integer number (30306314373).

Almost surely, 2^121224554441 is an apocalyptic number.

It is an amenable number.

121224554441 is a deficient number, since it is larger than the sum of its proper divisors (703051).

121224554441 is an equidigital number, since it uses as much as digits as its factorization.

121224554441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703050.

The product of its digits is 51200, while the sum is 35.

Adding to 121224554441 its reverse (144455422121), we get a palindrome (265679976562).

The spelling of 121224554441 in words is "one hundred twenty-one billion, two hundred twenty-four million, five hundred fifty-four thousand, four hundred forty-one".