80010021 has 48 divisors (see below), whose sum is σ = 136379264. Its totient is φ = 40601088.

The previous prime is 80010001. The next prime is 80010023. The reversal of 80010021 is 12001008.

It is a happy number.

It is not a de Polignac number, because 80010021 - 2¹⁰ = 80008997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80009979 and 80010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 898945 + ... + 899033.

Almost surely, 2^80010021 is an apocalyptic number.

It is an amenable number.

80010021 is a deficient number, since it is larger than the sum of its proper divisors (56369243).

80010021 is a wasteful number, since it uses less digits than its factorization.

80010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 80010021 is about 8944.8320833876. The cubic root of 80010021 is about 430.9049285802.

Adding to 80010021 its reverse (12001008), we get a palindrome (92011029).

The spelling of 80010021 in words is "eighty million, ten thousand, twenty-one".