2155120027 has 2 divisors, whose sum is σ = 2155120028. Its totient is φ = 2155120026.

The previous prime is 2155120001. The next prime is 2155120069. The reversal of 2155120027 is 7200215512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2155120027 - 2⁷ = 2155119899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2155119983 and 2155120010.

It is not a weakly prime, because it can be changed into another prime (2155120327) 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, 1077560013 + 1077560014.

It is an arithmetic number, because the mean of its divisors is an integer number (1077560014).

Almost surely, 2^2155120027 is an apocalyptic number.

2155120027 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155120027 is an equidigital number, since it uses as much as digits as its factorization.

2155120027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 2155120027 is about 46423.2703178051. The cubic root of 2155120027 is about 1291.6866000688.

Adding to 2155120027 its reverse (7200215512), we get a palindrome (9355335539).

The spelling of 2155120027 in words is "two billion, one hundred fifty-five million, one hundred twenty thousand, twenty-seven".