20101199 has 2 divisors, whose sum is σ = 20101200. Its totient is φ = 20101198.

The previous prime is 20101187. The next prime is 20101201. The reversal of 20101199 is 99110102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101199 - 2⁸ = 20100943 is a prime.

Together with 20101201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101129) 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, 10050599 + 10050600.

It is an arithmetic number, because the mean of its divisors is an integer number (10050600).

Almost surely, 2^20101199 is an apocalyptic number.

20101199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101199 is an equidigital number, since it uses as much as digits as its factorization.

20101199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 20101199 is about 4483.4360706940. The cubic root of 20101199 is about 271.8988188759.

The spelling of 20101199 in words is "twenty million, one hundred one thousand, one hundred ninety-nine".