121224314221 has 16 divisors (see below), whose sum is σ = 128628960768. Its totient is φ = 113850374400.

The previous prime is 121224314207. The next prime is 121224314249. The reversal of 121224314221 is 122413422121.

It is a cyclic number.

It is not a de Polignac number, because 121224314221 - 2¹³ = 121224306029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121224314021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17847336 + ... + 17854126.

It is an arithmetic number, because the mean of its divisors is an integer number (8039310048).

Almost surely, 2^121224314221 is an apocalyptic number.

It is an amenable number.

121224314221 is a deficient number, since it is larger than the sum of its proper divisors (7404646547).

121224314221 is a wasteful number, since it uses less digits than its factorization.

121224314221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892.

The product of its digits is 1536, while the sum is 25.

Adding to 121224314221 its reverse (122413422121), we get a palindrome (243637736342).

The spelling of 121224314221 in words is "one hundred twenty-one billion, two hundred twenty-four million, three hundred fourteen thousand, two hundred twenty-one".