20211010111211 has 2 divisors, whose sum is σ = 20211010111212. Its totient is φ = 20211010111210.

The previous prime is 20211010111181. The next prime is 20211010111217. The reversal of 20211010111211 is 11211101011202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211010111211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211010111217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105505055605 + 10105505055606.

It is an arithmetic number, because the mean of its divisors is an integer number (10105505055606).

Almost surely, 2^{20211010111211} is an apocalyptic number.

20211010111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211010111211 is an equidigital number, since it uses as much as digits as its factorization.

20211010111211 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 20211010111211 its reverse (11211101011202), we get a palindrome (31422111122413).

The spelling of 20211010111211 in words is "twenty trillion, two hundred eleven billion, ten million, one hundred eleven thousand, two hundred eleven".