121143111 has 16 divisors (see below), whose sum is σ = 167298048. Its totient is φ = 77924000.

The previous prime is 121143101. The next prime is 121143149. The reversal of 121143111 is 111341121.

It is a cyclic number.

It is not a de Polignac number, because 121143111 - 2⁵ = 121143079 is a prime.

It is a super-3 number, since 3×121143111³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3961 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (10456128).

Almost surely, 2^121143111 is an apocalyptic number.

121143111 is a deficient number, since it is larger than the sum of its proper divisors (46154937).

121143111 is a wasteful number, since it uses less digits than its factorization.

121143111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222.

The product of its digits is 24, while the sum is 15.

The square root of 121143111 is about 11006.5031231541. The cubic root of 121143111 is about 494.8036646116.

Adding to 121143111 its reverse (111341121), we get a palindrome (232484232).

It can be divided in two parts, 12114 and 3111, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 121143111 in words is "one hundred twenty-one million, one hundred forty-three thousand, one hundred eleven".