27741427221 has 4 divisors (see below), whose sum is σ = 36988569632. Its totient is φ = 18494284812.

The previous prime is 27741427199. The next prime is 27741427249. The reversal of 27741427221 is 12272414772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27741427221 - 2¹³ = 27741419029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27741427221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27741427291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4623571201 + ... + 4623571206.

It is an arithmetic number, because the mean of its divisors is an integer number (9247142408).

Almost surely, 2^27741427221 is an apocalyptic number.

It is an amenable number.

27741427221 is a deficient number, since it is larger than the sum of its proper divisors (9247142411).

27741427221 is an equidigital number, since it uses as much as digits as its factorization.

27741427221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9247142410.

The product of its digits is 87808, while the sum is 39.

The spelling of 27741427221 in words is "twenty-seven billion, seven hundred forty-one million, four hundred twenty-seven thousand, two hundred twenty-one".