203120011 has 2 divisors, whose sum is σ = 203120012. Its totient is φ = 203120010.

The previous prime is 203119997. The next prime is 203120033. The reversal of 203120011 is 110021302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203120011 - 2⁷ = 203119883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203120011.

It is not a weakly prime, because it can be changed into another prime (203120111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101560005 + 101560006.

It is an arithmetic number, because the mean of its divisors is an integer number (101560006).

Almost surely, 2^203120011 is an apocalyptic number.

203120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

203120011 is an equidigital number, since it uses as much as digits as its factorization.

203120011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 203120011 is about 14252.0177869662. The cubic root of 203120011 is about 587.8288592513.

Adding to 203120011 its reverse (110021302), we get a palindrome (313141313).

The spelling of 203120011 in words is "two hundred three million, one hundred twenty thousand, eleven".