27223121 has 2 divisors, whose sum is σ = 27223122. Its totient is φ = 27223120.

The previous prime is 27223111. The next prime is 27223127. The reversal of 27223121 is 12132272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27196225 + 26896 = 5215^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 27223121 - 2¹⁴ = 27206737 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27223093 and 27223102.

It is not a weakly prime, because it can be changed into another prime (27223127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13611560 + 13611561.

It is an arithmetic number, because the mean of its divisors is an integer number (13611561).

Almost surely, 2^27223121 is an apocalyptic number.

It is an amenable number.

27223121 is a deficient number, since it is larger than the sum of its proper divisors (1).

27223121 is an equidigital number, since it uses as much as digits as its factorization.

27223121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 27223121 is about 5217.5780779975. The cubic root of 27223121 is about 300.8241081536.

Adding to 27223121 its reverse (12132272), we get a palindrome (39355393).

The spelling of 27223121 in words is "twenty-seven million, two hundred twenty-three thousand, one hundred twenty-one".