244440130421 has 2 divisors, whose sum is σ = 244440130422. Its totient is φ = 244440130420.

The previous prime is 244440130397. The next prime is 244440130439. The reversal of 244440130421 is 124031044442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212770012900 + 31670117521 = 461270^2 + 177961^2 .

It is a cyclic number.

It is not a de Polignac number, because 244440130421 - 2⁶ = 244440130357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244440135421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122220065210 + 122220065211.

It is an arithmetic number, because the mean of its divisors is an integer number (122220065211).

Almost surely, 2^244440130421 is an apocalyptic number.

It is an amenable number.

244440130421 is a deficient number, since it is larger than the sum of its proper divisors (1).

244440130421 is an equidigital number, since it uses as much as digits as its factorization.

244440130421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 244440130421 its reverse (124031044442), we get a palindrome (368471174863).

The spelling of 244440130421 in words is "two hundred forty-four billion, four hundred forty million, one hundred thirty thousand, four hundred twenty-one".