27151005121 has 4 divisors (see below), whose sum is σ = 27522936772. Its totient is φ = 26779073472.

The previous prime is 27151005107. The next prime is 27151005169. The reversal of 27151005121 is 12150015172.

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 13147832896 + 14003172225 = 114664^2 + 118335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27151005121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27151005421) 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, 185965716 + ... + 185965861.

It is an arithmetic number, because the mean of its divisors is an integer number (6880734193).

Almost surely, 2^27151005121 is an apocalyptic number.

It is an amenable number.

27151005121 is a deficient number, since it is larger than the sum of its proper divisors (371931651).

27151005121 is an equidigital number, since it uses as much as digits as its factorization.

27151005121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371931650.

The product of its (nonzero) digits is 700, while the sum is 25.

The spelling of 27151005121 in words is "twenty-seven billion, one hundred fifty-one million, five thousand, one hundred twenty-one".