122111111011 has 2 divisors, whose sum is σ = 122111111012. Its totient is φ = 122111111010.

The previous prime is 122111110981. The next prime is 122111111047. The reversal of 122111111011 is 110111111221.

It is a weak prime.

It is an emirp because it is prime and its reverse (110111111221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122111111011 is a prime.

It is a super-2 number, since 2×122111111011² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122111110982 and 122111111000.

It is not a weakly prime, because it can be changed into another prime (122111111051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61055555505 + 61055555506.

It is an arithmetic number, because the mean of its divisors is an integer number (61055555506).

Almost surely, 2^122111111011 is an apocalyptic number.

122111111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

122111111011 is an equidigital number, since it uses as much as digits as its factorization.

122111111011 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 13.

Adding to 122111111011 its reverse (110111111221), we get a palindrome (232222222232).

The spelling of 122111111011 in words is "one hundred twenty-two billion, one hundred eleven million, one hundred eleven thousand, eleven".