1023044021 has 2 divisors, whose sum is σ = 1023044022. Its totient is φ = 1023044020.

The previous prime is 1023044017. The next prime is 1023044039. The reversal of 1023044021 is 1204403201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791578225 + 231465796 = 28135^2 + 15214^2 .

It is an emirp because it is prime and its reverse (1204403201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023044021 - 2² = 1023044017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023044081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511522010 + 511522011.

It is an arithmetic number, because the mean of its divisors is an integer number (511522011).

Almost surely, 2^1023044021 is an apocalyptic number.

It is an amenable number.

1023044021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023044021 is an equidigital number, since it uses as much as digits as its factorization.

1023044021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1023044021 is about 31985.0593402607. The cubic root of 1023044021 is about 1007.6230813022.

Adding to 1023044021 its reverse (1204403201), we get a palindrome (2227447222).

The spelling of 1023044021 in words is "one billion, twenty-three million, forty-four thousand, twenty-one".