121111411 has 4 divisors (see below), whose sum is σ = 122919112. Its totient is φ = 119303712.

The previous prime is 121111409. The next prime is 121111421. The reversal of 121111411 is 114111121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121111411 - 2¹ = 121111409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111391 and 121111400.

It is not an unprimeable number, because it can be changed into a prime (121111421) 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 in 3 ways as a sum of consecutive naturals, for example, 903750 + ... + 903883.

It is an arithmetic number, because the mean of its divisors is an integer number (30729778).

Almost surely, 2^121111411 is an apocalyptic number.

121111411 is a deficient number, since it is larger than the sum of its proper divisors (1807701).

121111411 is an equidigital number, since it uses as much as digits as its factorization.

121111411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807700.

The product of its digits is 8, while the sum is 13.

The square root of 121111411 is about 11005.0629711965. The cubic root of 121111411 is about 494.7605017652.

Adding to 121111411 its reverse (114111121), we get a palindrome (235222532).

The spelling of 121111411 in words is "one hundred twenty-one million, one hundred eleven thousand, four hundred eleven".