1444111021 has 2 divisors, whose sum is σ = 1444111022. Its totient is φ = 1444111020.

The previous prime is 1444111007. The next prime is 1444111027. The reversal of 1444111021 is 1201114441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338535396 + 105575625 = 36586^2 + 10275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444111021 - 2²¹ = 1442013869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1444111021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444111027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722055510 + 722055511.

It is an arithmetic number, because the mean of its divisors is an integer number (722055511).

Almost surely, 2^1444111021 is an apocalyptic number.

It is an amenable number.

1444111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444111021 is an equidigital number, since it uses as much as digits as its factorization.

1444111021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1444111021 is about 38001.4607745544. The cubic root of 1444111021 is about 1130.3168299986.

Adding to 1444111021 its reverse (1201114441), we get a palindrome (2645225462).

The spelling of 1444111021 in words is "one billion, four hundred forty-four million, one hundred eleven thousand, twenty-one".