121444417 has 2 divisors, whose sum is σ = 121444418. Its totient is φ = 121444416.

The previous prime is 121444403. The next prime is 121444423. The reversal of 121444417 is 714444121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94653441 + 26790976 = 9729^2 + 5176^2 .

It is an emirp because it is prime and its reverse (714444121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121444417 - 2¹⁵ = 121411649 is a prime.

It is not a weakly prime, because it can be changed into another prime (121444487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60722208 + 60722209.

It is an arithmetic number, because the mean of its divisors is an integer number (60722209).

Almost surely, 2^121444417 is an apocalyptic number.

It is an amenable number.

121444417 is a deficient number, since it is larger than the sum of its proper divisors (1).

121444417 is an equidigital number, since it uses as much as digits as its factorization.

121444417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 28.

The square root of 121444417 is about 11020.1822580210. The cubic root of 121444417 is about 495.2135486444.

Adding to 121444417 its reverse (714444121), we get a palindrome (835888538).

It can be divided in two parts, 1214444 and 17, that added together give a triangular number (1214461 = T₁₅₅₈).

The spelling of 121444417 in words is "one hundred twenty-one million, four hundred forty-four thousand, four hundred seventeen".