20011111209203 has 2 divisors, whose sum is σ = 20011111209204. Its totient is φ = 20011111209202.

The previous prime is 20011111209161. The next prime is 20011111209217. The reversal of 20011111209203 is 30290211111002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011111209203 - 2³⁸ = 19736233302259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20011111209703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005555604601 + 10005555604602.

It is an arithmetic number, because the mean of its divisors is an integer number (10005555604602).

Almost surely, 2^{20011111209203} is an apocalyptic number.

20011111209203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011111209203 is an equidigital number, since it uses as much as digits as its factorization.

20011111209203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 20011111209203 in words is "twenty trillion, eleven billion, one hundred eleven million, two hundred nine thousand, two hundred three".