121112011 has 2 divisors, whose sum is σ = 121112012. Its totient is φ = 121112010.

The previous prime is 121111999. The next prime is 121112027. The reversal of 121112011 is 110211121.

It is a weak prime.

It is an emirp because it is prime and its reverse (110211121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121112011 - 2⁵ = 121111979 is a prime.

It is not a weakly prime, because it can be changed into another prime (121112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556005 + 60556006.

It is an arithmetic number, because the mean of its divisors is an integer number (60556006).

Almost surely, 2^121112011 is an apocalyptic number.

121112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112011 is an equidigital number, since it uses as much as digits as its factorization.

121112011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 121112011 is about 11005.0902313429. The cubic root of 121112011 is about 494.7613187975.

Adding to 121112011 its reverse (110211121), we get a palindrome (231323132).

The spelling of 121112011 in words is "one hundred twenty-one million, one hundred twelve thousand, eleven".