211622111111 has 2 divisors, whose sum is σ = 211622111112. Its totient is φ = 211622111110.

The previous prime is 211622111069. The next prime is 211622111159. The reversal of 211622111111 is 111111226112.

It is a m-pointer prime, because the next prime (211622111159) can be obtained adding 211622111111 to its product of digits (48).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211622111111 - 2⁶ = 211622111047 is a prime.

It is a super-2 number, since 2×211622111111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211622111611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105811055555 + 105811055556.

It is an arithmetic number, because the mean of its divisors is an integer number (105811055556).

Almost surely, 2^211622111111 is an apocalyptic number.

211622111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211622111111 is an equidigital number, since it uses as much as digits as its factorization.

211622111111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 20.

Adding to 211622111111 its reverse (111111226112), we get a palindrome (322733337223).

The spelling of 211622111111 in words is "two hundred eleven billion, six hundred twenty-two million, one hundred eleven thousand, one hundred eleven".