201020249 has 2 divisors, whose sum is σ = 201020250. Its totient is φ = 201020248.

The previous prime is 201020233. The next prime is 201020251. The reversal of 201020249 is 942020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171426649 + 29593600 = 13093^2 + 5440^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020249 - 2⁴ = 201020233 is a prime.

Together with 201020251, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201020249.

It is not a weakly prime, because it can be changed into another prime (201029249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510124 + 100510125.

It is an arithmetic number, because the mean of its divisors is an integer number (100510125).

Almost surely, 2^201020249 is an apocalyptic number.

It is an amenable number.

201020249 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020249 is an equidigital number, since it uses as much as digits as its factorization.

201020249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 201020249 is about 14178.1609879420. The cubic root of 201020249 is about 585.7962702354.

The spelling of 201020249 in words is "two hundred one million, twenty thousand, two hundred forty-nine".