27000007121 has 4 divisors (see below), whose sum is σ = 28588242852. Its totient is φ = 25411771392.

The previous prime is 27000007061. The next prime is 27000007123. The reversal of 27000007121 is 12170000072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14469443521 + 12530563600 = 120289^2 + 111940^2 .

It is a cyclic number.

It is not a de Polignac number, because 27000007121 - 2¹⁴ = 26999990737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27000007093 and 27000007102.

It is not an unprimeable number, because it can be changed into a prime (27000007123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794117840 + ... + 794117873.

It is an arithmetic number, because the mean of its divisors is an integer number (7147060713).

Almost surely, 2^27000007121 is an apocalyptic number.

It is an amenable number.

27000007121 is a deficient number, since it is larger than the sum of its proper divisors (1588235731).

27000007121 is a wasteful number, since it uses less digits than its factorization.

27000007121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588235730.

The product of its (nonzero) digits is 196, while the sum is 20.

Adding to 27000007121 its reverse (12170000072), we get a palindrome (39170007193).

The spelling of 27000007121 in words is "twenty-seven billion, seven thousand, one hundred twenty-one".