80004021421 has 8 divisors (see below), whose sum is σ = 81259364160. Its totient is φ = 78756599328.

The previous prime is 80004021401. The next prime is 80004021457. The reversal of 80004021421 is 12412040008.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80004021421 - 2²¹ = 80001924269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80004021392 and 80004021401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80004021401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1959801 + ... + 2000206.

It is an arithmetic number, because the mean of its divisors is an integer number (10157420520).

Almost surely, 2^80004021421 is an apocalyptic number.

It is an amenable number.

80004021421 is a deficient number, since it is larger than the sum of its proper divisors (1255342739).

80004021421 is a wasteful number, since it uses less digits than its factorization.

80004021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960323.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 80004021421 its reverse (12412040008), we get a palindrome (92416061429).

The spelling of 80004021421 in words is "eighty billion, four million, twenty-one thousand, four hundred twenty-one".