20111001203 has 2 divisors, whose sum is σ = 20111001204. Its totient is φ = 20111001202.

The previous prime is 20111001187. The next prime is 20111001227. The reversal of 20111001203 is 30210011102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111001203 - 2⁴ = 20111001187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20111001233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055500601 + 10055500602.

It is an arithmetic number, because the mean of its divisors is an integer number (10055500602).

Almost surely, 2^20111001203 is an apocalyptic number.

20111001203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111001203 is an equidigital number, since it uses as much as digits as its factorization.

20111001203 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 11.

Adding to 20111001203 its reverse (30210011102), we get a palindrome (50321012305).

The spelling of 20111001203 in words is "twenty billion, one hundred eleven million, one thousand, two hundred three".