20211100101211 has 2 divisors, whose sum is σ = 20211100101212. Its totient is φ = 20211100101210.

The previous prime is 20211100101187. The next prime is 20211100101253. The reversal of 20211100101211 is 11210100111202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211100101211 - 2²¹ = 20211098004059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20211100101191 and 20211100101200.

It is not a weakly prime, because it can be changed into another prime (20211100108211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105550050605 + 10105550050606.

It is an arithmetic number, because the mean of its divisors is an integer number (10105550050606).

Almost surely, 2^{20211100101211} is an apocalyptic number.

20211100101211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211100101211 is an equidigital number, since it uses as much as digits as its factorization.

20211100101211 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 13.

Adding to 20211100101211 its reverse (11210100111202), we get a palindrome (31421200212413).

Subtracting from 20211100101211 its reverse (11210100111202), we obtain a palindrome (9000999990009).

The spelling of 20211100101211 in words is "twenty trillion, two hundred eleven billion, one hundred million, one hundred one thousand, two hundred eleven".