121011111110121 has 16 divisors (see below), whose sum is σ = 165893370978048. Its totient is φ = 78415984137600.

The previous prime is 121011111110101. The next prime is 121011111110171.

It is a happy number.

121011111110121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 121011111110121 - 2¹¹ = 121011111108073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121011111110121.

It is not an unprimeable number, because it can be changed into a prime (121011111110101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1815151486 + ... + 1815218151.

It is an arithmetic number, because the mean of its divisors is an integer number (10368335686128).

Almost surely, 2^{121011111110121} is an apocalyptic number.

It is an amenable number.

121011111110121 is a deficient number, since it is larger than the sum of its proper divisors (44882259867927).

121011111110121 is a wasteful number, since it uses less digits than its factorization.

121011111110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630369952.

The product of its (nonzero) digits is 4, while the sum is 15.

The spelling of 121011111110121 in words is "one hundred twenty-one trillion, eleven billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-one".