244120421 has 2 divisors, whose sum is σ = 244120422. Its totient is φ = 244120420.

The previous prime is 244120411. The next prime is 244120423. The reversal of 244120421 is 124021442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225750625 + 18369796 = 15025^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 244120421 - 2¹⁰ = 244119397 is a prime.

Together with 244120423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 244120393 and 244120402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244120423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122060210 + 122060211.

It is an arithmetic number, because the mean of its divisors is an integer number (122060211).

Almost surely, 2^244120421 is an apocalyptic number.

It is an amenable number.

244120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

244120421 is an equidigital number, since it uses as much as digits as its factorization.

244120421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 244120421 is about 15624.3534586235. The cubic root of 244120421 is about 624.9827587777.

Adding to 244120421 its reverse (124021442), we get a palindrome (368141863).

The spelling of 244120421 in words is "two hundred forty-four million, one hundred twenty thousand, four hundred twenty-one".