27220121 has 2 divisors, whose sum is σ = 27220122. Its totient is φ = 27220120.

The previous prime is 27220117. The next prime is 27220129. The reversal of 27220121 is 12102272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 1413721 = 5080^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 27220121 - 2² = 27220117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27220121.

It is not a weakly prime, because it can be changed into another prime (27220129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13610060 + 13610061.

It is an arithmetic number, because the mean of its divisors is an integer number (13610061).

Almost surely, 2^27220121 is an apocalyptic number.

It is an amenable number.

27220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

27220121 is an equidigital number, since it uses as much as digits as its factorization.

27220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 27220121 is about 5217.2905803683. The cubic root of 27220121 is about 300.8130574310.

Adding to 27220121 its reverse (12102272), we get a palindrome (39322393).

The spelling of 27220121 in words is "twenty-seven million, two hundred twenty thousand, one hundred twenty-one".