27021121 has 2 divisors, whose sum is σ = 27021122. Its totient is φ = 27021120.

The previous prime is 27021083. The next prime is 27021131. The reversal of 27021121 is 12112072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 13249600 = 3711^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 27021121 - 2⁷ = 27020993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27021095 and 27021104.

It is not a weakly prime, because it can be changed into another prime (27021131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13510560 + 13510561.

It is an arithmetic number, because the mean of its divisors is an integer number (13510561).

Almost surely, 2^27021121 is an apocalyptic number.

It is an amenable number.

27021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

27021121 is an equidigital number, since it uses as much as digits as its factorization.

27021121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 27021121 is about 5198.1843945747. The cubic root of 27021121 is about 300.0782055371.

Adding to 27021121 its reverse (12112072), we get a palindrome (39133193).

The spelling of 27021121 in words is "twenty-seven million, twenty-one thousand, one hundred twenty-one".