27122700221 has 2 divisors, whose sum is σ = 27122700222. Its totient is φ = 27122700220.

The previous prime is 27122700217. The next prime is 27122700257. The reversal of 27122700221 is 12200722172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23295916900 + 3826783321 = 152630^2 + 61861^2 .

It is a cyclic number.

It is not a de Polignac number, because 27122700221 - 2² = 27122700217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27122700211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13561350110 + 13561350111.

It is an arithmetic number, because the mean of its divisors is an integer number (13561350111).

Almost surely, 2^27122700221 is an apocalyptic number.

It is an amenable number.

27122700221 is a deficient number, since it is larger than the sum of its proper divisors (1).

27122700221 is an equidigital number, since it uses as much as digits as its factorization.

27122700221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 26.

The spelling of 27122700221 in words is "twenty-seven billion, one hundred twenty-two million, seven hundred thousand, two hundred twenty-one".