1010030021 has 24 divisors (see below), whose sum is σ = 1363593024. Its totient is φ = 726485760.

The previous prime is 1010030011. The next prime is 1010030023. The reversal of 1010030021 is 1200300101.

It is a de Polignac number, because none of the positive numbers 2^k-1010030021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1010029990 and 1010030008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010030023) 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 in 23 ways as a sum of consecutive naturals, for example, 25796 + ... + 51821.

It is an arithmetic number, because the mean of its divisors is an integer number (56816376).

Almost surely, 2^1010030021 is an apocalyptic number.

1010030021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1010030021 is a deficient number, since it is larger than the sum of its proper divisors (353563003).

1010030021 is a wasteful number, since it uses less digits than its factorization.

1010030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77661 (or 77648 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1010030021 is about 31780.9694786046. The cubic root of 1010030021 is about 1003.3322242813.

Adding to 1010030021 its reverse (1200300101), we get a palindrome (2210330122).

The spelling of 1010030021 in words is "one billion, ten million, thirty thousand, twenty-one".