27443760121 has 2 divisors, whose sum is σ = 27443760122. Its totient is φ = 27443760120.

The previous prime is 27443760089. The next prime is 27443760133. The reversal of 27443760121 is 12106734472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26088710400 + 1355049721 = 161520^2 + 36811^2 .

It is a cyclic number.

It is not a de Polignac number, because 27443760121 - 2⁵ = 27443760089 is a prime.

It is not a weakly prime, because it can be changed into another prime (27443760181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13721880060 + 13721880061.

It is an arithmetic number, because the mean of its divisors is an integer number (13721880061).

Almost surely, 2^27443760121 is an apocalyptic number.

It is an amenable number.

27443760121 is a deficient number, since it is larger than the sum of its proper divisors (1).

27443760121 is an equidigital number, since it uses as much as digits as its factorization.

27443760121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 27443760121 in words is "twenty-seven billion, four hundred forty-three million, seven hundred sixty thousand, one hundred twenty-one".