27123074221 has 4 divisors (see below), whose sum is σ = 27567714844. Its totient is φ = 26678433600.

The previous prime is 27123074203. The next prime is 27123074261. The reversal of 27123074221 is 12247032172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10549344100 + 16573730121 = 102710^2 + 128739^2 .

It is a cyclic number.

It is not a de Polignac number, because 27123074221 - 2²¹ = 27120977069 is a prime.

It is a super-2 number, since 2×27123074221² (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 (27123074261) 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, 222320220 + ... + 222320341.

It is an arithmetic number, because the mean of its divisors is an integer number (6891928711).

Almost surely, 2^27123074221 is an apocalyptic number.

It is an amenable number.

27123074221 is a deficient number, since it is larger than the sum of its proper divisors (444640623).

27123074221 is an equidigital number, since it uses as much as digits as its factorization.

27123074221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444640622.

The product of its (nonzero) digits is 9408, while the sum is 31.

The spelling of 27123074221 in words is "twenty-seven billion, one hundred twenty-three million, seventy-four thousand, two hundred twenty-one".