20101227 has 4 divisors (see below), whose sum is σ = 26801640. Its totient is φ = 13400816.

The previous prime is 20101219. The next prime is 20101229. The reversal of 20101227 is 72210102.

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 20101227 - 2³ = 20101219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350202 + ... + 3350207.

It is an arithmetic number, because the mean of its divisors is an integer number (6700410).

Almost surely, 2^20101227 is an apocalyptic number.

20101227 is a deficient number, since it is larger than the sum of its proper divisors (6700413).

20101227 is an equidigital number, since it uses as much as digits as its factorization.

20101227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700412.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 20101227 is about 4483.4391932979. The cubic root of 20101227 is about 271.8989451231.

Adding to 20101227 its reverse (72210102), we get a palindrome (92311329).

The spelling of 20101227 in words is "twenty million, one hundred one thousand, two hundred twenty-seven".