27001478221 has 8 divisors (see below), whose sum is σ = 27296124800. Its totient is φ = 26708266080.

The previous prime is 27001478219. The next prime is 27001478243. The reversal of 27001478221 is 12287410072.

It is a happy number.

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 27001478221 - 2¹ = 27001478219 is a prime.

It is a super-2 number, since 2×27001478221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27001478261) 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, 320736 + ... + 396073.

It is an arithmetic number, because the mean of its divisors is an integer number (3412015600).

Almost surely, 2^27001478221 is an apocalyptic number.

It is an amenable number.

27001478221 is a deficient number, since it is larger than the sum of its proper divisors (294646579).

27001478221 is a wasteful number, since it uses less digits than its factorization.

27001478221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717219.

The product of its (nonzero) digits is 12544, while the sum is 34.

Adding to 27001478221 its reverse (12287410072), we get a palindrome (39288888293).

The spelling of 27001478221 in words is "twenty-seven billion, one million, four hundred seventy-eight thousand, two hundred twenty-one".