27221172001 has 2 divisors, whose sum is σ = 27221172002. Its totient is φ = 27221172000.

The previous prime is 27221171947. The next prime is 27221172047. The reversal of 27221172001 is 10027112272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27126090000 + 95082001 = 164700^2 + 9751^2 .

It is a cyclic number.

It is not a de Polignac number, because 27221172001 - 2¹¹ = 27221169953 is a prime.

It is not a weakly prime, because it can be changed into another prime (27221176001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13610586000 + 13610586001.

It is an arithmetic number, because the mean of its divisors is an integer number (13610586001).

Almost surely, 2^27221172001 is an apocalyptic number.

It is an amenable number.

27221172001 is a deficient number, since it is larger than the sum of its proper divisors (1).

27221172001 is an equidigital number, since it uses as much as digits as its factorization.

27221172001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 27221172001 its reverse (10027112272), we get a palindrome (37248284273).

The spelling of 27221172001 in words is "twenty-seven billion, two hundred twenty-one million, one hundred seventy-two thousand, one".