212221110020111 has 2 divisors, whose sum is σ = 212221110020112. Its totient is φ = 212221110020110.

The previous prime is 212221110020057. The next prime is 212221110020123. The reversal of 212221110020111 is 111020011122212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221110020111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212221110020111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221110020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110555010055 + 106110555010056.

It is an arithmetic number, because the mean of its divisors is an integer number (106110555010056).

Almost surely, 2^{212221110020111} is an apocalyptic number.

212221110020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221110020111 is an equidigital number, since it uses as much as digits as its factorization.

212221110020111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212221110020111 its reverse (111020011122212), we get a palindrome (323241121142323).

The spelling of 212221110020111 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred ten million, twenty thousand, one hundred eleven".