212211210001111 has 2 divisors, whose sum is σ = 212211210001112. Its totient is φ = 212211210001110.

The previous prime is 212211210001093. The next prime is 212211210001181. The reversal of 212211210001111 is 111100012112212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212211210001111 - 2¹⁷ = 212211209870039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212211210001181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105605000555 + 106105605000556.

It is an arithmetic number, because the mean of its divisors is an integer number (106105605000556).

Almost surely, 2^{212211210001111} is an apocalyptic number.

212211210001111 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211210001111 is an equidigital number, since it uses as much as digits as its factorization.

212211210001111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 212211210001111 its reverse (111100012112212), we get a palindrome (323311222113323).

The spelling of 212211210001111 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred ten million, one thousand, one hundred eleven".