27121331 has 4 divisors (see below), whose sum is σ = 27136200. Its totient is φ = 27106464.

The previous prime is 27121321. The next prime is 27121403. The reversal of 27121331 is 13312172.

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

It is a cyclic number.

It is not a de Polignac number, because 27121331 - 2²² = 22927027 is a prime.

It is a super-2 number, since 2×27121331² = 1471133190423122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27121321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4241 + ... + 8498.

It is an arithmetic number, because the mean of its divisors is an integer number (6784050).

Almost surely, 2^27121331 is an apocalyptic number.

27121331 is a deficient number, since it is larger than the sum of its proper divisors (14869).

27121331 is a wasteful number, since it uses less digits than its factorization.

27121331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14868.

The product of its digits is 252, while the sum is 20.

The square root of 27121331 is about 5207.8144168163. The cubic root of 27121331 is about 300.4487026260.

The spelling of 27121331 in words is "twenty-seven million, one hundred twenty-one thousand, three hundred thirty-one".