20011101121211 has 2 divisors, whose sum is σ = 20011101121212. Its totient is φ = 20011101121210.

The previous prime is 20011101121181. The next prime is 20011101121237. The reversal of 20011101121211 is 11212110111002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011101121211 - 2¹⁰ = 20011101120187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20011101121241) 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, 10005550560605 + 10005550560606.

It is an arithmetic number, because the mean of its divisors is an integer number (10005550560606).

Almost surely, 2^{20011101121211} is an apocalyptic number.

20011101121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011101121211 is an equidigital number, since it uses as much as digits as its factorization.

20011101121211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20011101121211 its reverse (11212110111002), we get a palindrome (31223211232213).

The spelling of 20011101121211 in words is "twenty trillion, eleven billion, one hundred one million, one hundred twenty-one thousand, two hundred eleven".