121012210102121 has 16 divisors (see below), whose sum is σ = 130778252520384. Its totient is φ = 111311915287104.

The previous prime is 121012210102117. The next prime is 121012210102151. The reversal of 121012210102121 is 121201012210121.

It is a cyclic number.

It is not a de Polignac number, because 121012210102121 - 2² = 121012210102117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121012210102121.

It is not an unprimeable number, because it can be changed into a prime (121012210102151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1194815 + ... + 15602948.

It is an arithmetic number, because the mean of its divisors is an integer number (8173640782524).

Almost surely, 2^{121012210102121} is an apocalyptic number.

It is an amenable number.

121012210102121 is a deficient number, since it is larger than the sum of its proper divisors (9766042418263).

121012210102121 is a wasteful number, since it uses less digits than its factorization.

121012210102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16799720.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121012210102121 its reverse (121201012210121), we get a palindrome (242213222312242).

The spelling of 121012210102121 in words is "one hundred twenty-one trillion, twelve billion, two hundred ten million, one hundred two thousand, one hundred twenty-one".