27121121 has 4 divisors (see below), whose sum is σ = 27141312. Its totient is φ = 27100932.

The previous prime is 27121099. The next prime is 27121123. The reversal of 27121121 is 12112172.

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 a cyclic number.

It is not a de Polignac number, because 27121121 - 2⁶ = 27121057 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 27121121.

It is not an unprimeable number, because it can be changed into a prime (27121123) 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, 7925 + ... + 10818.

It is an arithmetic number, because the mean of its divisors is an integer number (6785328).

Almost surely, 2^27121121 is an apocalyptic number.

It is an amenable number.

27121121 is a deficient number, since it is larger than the sum of its proper divisors (20191).

27121121 is a wasteful number, since it uses less digits than its factorization.

27121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20190.

The product of its digits is 56, while the sum is 17.

The square root of 27121121 is about 5207.7942547685. The cubic root of 27121121 is about 300.4479271676.

Adding to 27121121 its reverse (12112172), we get a palindrome (39233293).

The spelling of 27121121 in words is "twenty-seven million, one hundred twenty-one thousand, one hundred twenty-one".