212011111211 has 2 divisors, whose sum is σ = 212011111212. Its totient is φ = 212011111210.

The previous prime is 212011111163. The next prime is 212011111243. The reversal of 212011111211 is 112111110212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212011111211 - 2¹⁸ = 212010849067 is a prime.

It is a super-2 number, since 2×212011111211² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212011111271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005555605 + 106005555606.

It is an arithmetic number, because the mean of its divisors is an integer number (106005555606).

Almost surely, 2^212011111211 is an apocalyptic number.

212011111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011111211 is an equidigital number, since it uses as much as digits as its factorization.

212011111211 is an evil number, because the sum of its binary digits is even.

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

Adding to 212011111211 its reverse (112111110212), we get a palindrome (324122221423).

Subtracting from 212011111211 its reverse (112111110212), we obtain a palindrome (99900000999).

The spelling of 212011111211 in words is "two hundred twelve billion, eleven million, one hundred eleven thousand, two hundred eleven".