27122121 has 40 divisors (see below), whose sum is σ = 44721600. Its totient is φ = 16275168.

The previous prime is 27122119. The next prime is 27122141. The reversal of 27122121 is 12122172.

It is a happy number.

It is not a de Polignac number, because 27122121 - 2¹ = 27122119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27122094 and 27122103.

It is not an unprimeable number, because it can be changed into a prime (27122111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44980 + ... + 45578.

It is an arithmetic number, because the mean of its divisors is an integer number (1118040).

Almost surely, 2^27122121 is an apocalyptic number.

It is an amenable number.

27122121 is a deficient number, since it is larger than the sum of its proper divisors (17599479).

27122121 is a wasteful number, since it uses less digits than its factorization.

27122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 658 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 27122121 is about 5207.8902638208. The cubic root of 27122121 is about 300.4516197907.

Adding to 27122121 its reverse (12122172), we get a palindrome (39244293).

The spelling of 27122121 in words is "twenty-seven million, one hundred twenty-two thousand, one hundred twenty-one".