211101021101111 has 2 divisors, whose sum is σ = 211101021101112. Its totient is φ = 211101021101110.

The previous prime is 211101021100961. The next prime is 211101021101147. The reversal of 211101021101111 is 111101120101112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211101021101111 is a prime.

It is a super-2 number, since 2×211101021101111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211101021101161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550510550555 + 105550510550556.

It is an arithmetic number, because the mean of its divisors is an integer number (105550510550556).

Almost surely, 2^{211101021101111} is an apocalyptic number.

211101021101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211101021101111 is an equidigital number, since it uses as much as digits as its factorization.

211101021101111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 211101021101111 its reverse (111101120101112), we get a palindrome (322202141202223).

Subtracting from 211101021101111 its reverse (111101120101112), we obtain a palindrome (99999900999999).

The spelling of 211101021101111 in words is "two hundred eleven trillion, one hundred one billion, twenty-one million, one hundred one thousand, one hundred eleven".