444232421021 has 2 divisors, whose sum is σ = 444232421022. Its totient is φ = 444232421020.

The previous prime is 444232420993. The next prime is 444232421027. The reversal of 444232421021 is 120124232444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419918256121 + 24314164900 = 648011^2 + 155930^2 .

It is a cyclic number.

It is not a de Polignac number, because 444232421021 - 2³⁴ = 427052551837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444232421027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222116210510 + 222116210511.

It is an arithmetic number, because the mean of its divisors is an integer number (222116210511).

Almost surely, 2^444232421021 is an apocalyptic number.

It is an amenable number.

444232421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

444232421021 is an equidigital number, since it uses as much as digits as its factorization.

444232421021 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 444232421021 its reverse (120124232444), we get a palindrome (564356653465).

The spelling of 444232421021 in words is "four hundred forty-four billion, two hundred thirty-two million, four hundred twenty-one thousand, twenty-one".