20101211101211 has 2 divisors, whose sum is σ = 20101211101212. Its totient is φ = 20101211101210.

The previous prime is 20101211101189. The next prime is 20101211101271. The reversal of 20101211101211 is 11210111210102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20101211101211 - 2¹⁴ = 20101211084827 is a prime.

It is not a weakly prime, because it can be changed into another prime (20101211101271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050605550605 + 10050605550606.

It is an arithmetic number, because the mean of its divisors is an integer number (10050605550606).

Almost surely, 2^{20101211101211} is an apocalyptic number.

20101211101211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101211101211 is an equidigital number, since it uses as much as digits as its factorization.

20101211101211 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 20101211101211 its reverse (11210111210102), we get a palindrome (31311322311313).

The spelling of 20101211101211 in words is "twenty trillion, one hundred one billion, two hundred eleven million, one hundred one thousand, two hundred eleven".