20112229 has 2 divisors, whose sum is σ = 20112230. Its totient is φ = 20112228.

The previous prime is 20112227. The next prime is 20112233. The reversal of 20112229 is 92221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 3992004 = 4015^2 + 1998^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112229 - 2¹ = 20112227 is a prime.

Together with 20112227, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112221) 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 as a sum of consecutive naturals, namely, 10056114 + 10056115.

It is an arithmetic number, because the mean of its divisors is an integer number (10056115).

Almost surely, 2^20112229 is an apocalyptic number.

It is an amenable number.

20112229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112229 is an equidigital number, since it uses as much as digits as its factorization.

20112229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 20112229 is about 4484.6659853327. The cubic root of 20112229 is about 271.9485422048.

The spelling of 20112229 in words is "twenty million, one hundred twelve thousand, two hundred twenty-nine".