20071211 has 2 divisors, whose sum is σ = 20071212. Its totient is φ = 20071210.

The previous prime is 20071199. The next prime is 20071213. The reversal of 20071211 is 11217002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20071211 - 2⁶ = 20071147 is a prime.

It is a super-2 number, since 2×20071211² = 805707022013042, which contains 22 as substring.

Together with 20071213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20071213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035605 + 10035606.

It is an arithmetic number, because the mean of its divisors is an integer number (10035606).

Almost surely, 2^20071211 is an apocalyptic number.

20071211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20071211 is an equidigital number, since it uses as much as digits as its factorization.

20071211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 20071211 is about 4480.0905124785. The cubic root of 20071211 is about 271.7635407125.

Adding to 20071211 its reverse (11217002), we get a palindrome (31288213).

The spelling of 20071211 in words is "twenty million, seventy-one thousand, two hundred eleven".