4144221310421 has 2 divisors, whose sum is σ = 4144221310422. Its totient is φ = 4144221310420.

The previous prime is 4144221310417. The next prime is 4144221310429. The reversal of 4144221310421 is 1240131224414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3403785154225 + 740436156196 = 1844935^2 + 860486^2 .

It is a cyclic number.

It is not a de Polignac number, because 4144221310421 - 2² = 4144221310417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4144221310429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2072110655210 + 2072110655211.

It is an arithmetic number, because the mean of its divisors is an integer number (2072110655211).

Almost surely, 2^{4144221310421} is an apocalyptic number.

It is an amenable number.

4144221310421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4144221310421 is an equidigital number, since it uses as much as digits as its factorization.

4144221310421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 4144221310421 its reverse (1240131224414), we get a palindrome (5384352534835).

The spelling of 4144221310421 in words is "four trillion, one hundred forty-four billion, two hundred twenty-one million, three hundred ten thousand, four hundred twenty-one".