27103040021 has 2 divisors, whose sum is σ = 27103040022. Its totient is φ = 27103040020.

The previous prime is 27103040017. The next prime is 27103040039. The reversal of 27103040021 is 12004030172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26208372100 + 894667921 = 161890^2 + 29911^2 .

It is a cyclic number.

It is not a de Polignac number, because 27103040021 - 2² = 27103040017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27103039975 and 27103040002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27103040011) 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, 13551520010 + 13551520011.

It is an arithmetic number, because the mean of its divisors is an integer number (13551520011).

Almost surely, 2^27103040021 is an apocalyptic number.

It is an amenable number.

27103040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

27103040021 is an equidigital number, since it uses as much as digits as its factorization.

27103040021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 27103040021 its reverse (12004030172), we get a palindrome (39107070193).

The spelling of 27103040021 in words is "twenty-seven billion, one hundred three million, forty thousand, twenty-one".