1012444021 has 2 divisors, whose sum is σ = 1012444022. Its totient is φ = 1012444020.

The previous prime is 1012444007. The next prime is 1012444057. The reversal of 1012444021 is 1204442101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 908118225 + 104325796 = 30135^2 + 10214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012444021 - 2⁵ = 1012443989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012444021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012444091) 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, 506222010 + 506222011.

It is an arithmetic number, because the mean of its divisors is an integer number (506222011).

Almost surely, 2^1012444021 is an apocalyptic number.

It is an amenable number.

1012444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012444021 is an equidigital number, since it uses as much as digits as its factorization.

1012444021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1012444021 is about 31818.9255161138. The cubic root of 1012444021 is about 1004.1309190108.

Adding to 1012444021 its reverse (1204442101), we get a palindrome (2216886122).

It can be divided in two parts, 10124 and 44021, that added together give a palindrome (54145).

The spelling of 1012444021 in words is "one billion, twelve million, four hundred forty-four thousand, twenty-one".