121110111200121 has 16 divisors (see below), whose sum is σ = 161531105862336. Its totient is φ = 80714596262976.

The previous prime is 121110111200083. The next prime is 121110111200129. The reversal of 121110111200121 is 121002111011121.

It is not a de Polignac number, because 121110111200121 - 2¹⁹ = 121110110675833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121110111200121.

It is not an unprimeable number, because it can be changed into a prime (121110111200129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823339846 + ... + 823486928.

It is an arithmetic number, because the mean of its divisors is an integer number (10095694116396).

Almost surely, 2^{121110111200121} is an apocalyptic number.

It is an amenable number.

121110111200121 is a deficient number, since it is larger than the sum of its proper divisors (40420994662215).

121110111200121 is a wasteful number, since it uses less digits than its factorization.

121110111200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231832.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121110111200121 its reverse (121002111011121), we get a palindrome (242112222211242).

The spelling of 121110111200121 in words is "one hundred twenty-one trillion, one hundred ten billion, one hundred eleven million, two hundred thousand, one hundred twenty-one".