121112311 has 2 divisors, whose sum is σ = 121112312. Its totient is φ = 121112310.

The previous prime is 121112291. The next prime is 121112317. The reversal of 121112311 is 113211121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (113211121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121112311 - 2⁹ = 121111799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121112291 and 121112300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121112317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556155 + 60556156.

It is an arithmetic number, because the mean of its divisors is an integer number (60556156).

Almost surely, 2^121112311 is an apocalyptic number.

121112311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112311 is an equidigital number, since it uses as much as digits as its factorization.

121112311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 13.

The square root of 121112311 is about 11005.1038613909. The cubic root of 121112311 is about 494.7617273126.

Adding to 121112311 its reverse (113211121), we get a palindrome (234323432).

The spelling of 121112311 in words is "one hundred twenty-one million, one hundred twelve thousand, three hundred eleven".