121448221 has 8 divisors (see below), whose sum is σ = 129148344. Its totient is φ = 113809920.

The previous prime is 121448189. The next prime is 121448233. The reversal of 121448221 is 122844121.

It can be written as a sum of positive squares in 4 ways, for example, as 55204900 + 66243321 = 7430^2 + 8139^2 .

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 121448221 - 2⁵ = 121448189 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 (121448251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11370 + ... + 19291.

It is an arithmetic number, because the mean of its divisors is an integer number (16143543).

Almost surely, 2^121448221 is an apocalyptic number.

It is an amenable number.

121448221 is a deficient number, since it is larger than the sum of its proper divisors (7700123).

121448221 is a wasteful number, since it uses less digits than its factorization.

121448221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30911.

The product of its digits is 1024, while the sum is 25.

The square root of 121448221 is about 11020.3548490963. The cubic root of 121448221 is about 495.2187191103.

The spelling of 121448221 in words is "one hundred twenty-one million, four hundred forty-eight thousand, two hundred twenty-one".