1010039021 has 2 divisors, whose sum is σ = 1010039022. Its totient is φ = 1010039020.

The previous prime is 1010038973. The next prime is 1010039033. The reversal of 1010039021 is 1209300101.

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., 777628996 + 232410025 = 27886^2 + 15245^2 .

It is an emirp because it is prime and its reverse (1209300101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1010039021 - 2⁶ = 1010038957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010039081) 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, 505019510 + 505019511.

It is an arithmetic number, because the mean of its divisors is an integer number (505019511).

Almost surely, 2^1010039021 is an apocalyptic number.

It is an amenable number.

1010039021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010039021 is an equidigital number, since it uses as much as digits as its factorization.

1010039021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1010039021 is about 31781.1110724594. Note that the first 3 decimals coincide. The cubic root of 1010039021 is about 1003.3352043786.

Adding to 1010039021 its reverse (1209300101), we get a palindrome (2219339122).

The spelling of 1010039021 in words is "one billion, ten million, thirty-nine thousand, twenty-one".