121020210221121 has 12 divisors (see below), whose sum is σ = 174811560972048. Its totient is φ = 80678021384664.

The previous prime is 121020210221051. The next prime is 121020210221161. The reversal of 121020210221121 is 121122012020121.

121020210221121 is a `hidden beast` number, since 1 + 210 + 2 + 0 + 210 + 221 + 1 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-121020210221121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121020210221094 and 121020210221103.

It is not an unprimeable number, because it can be changed into a prime (121020210221161) 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 11 ways as a sum of consecutive naturals, for example, 176201775 + ... + 176887268.

It is an arithmetic number, because the mean of its divisors is an integer number (14567630081004).

Almost surely, 2^{121020210221121} is an apocalyptic number.

It is an amenable number.

121020210221121 is a deficient number, since it is larger than the sum of its proper divisors (53791350750927).

121020210221121 is a wasteful number, since it uses less digits than its factorization.

121020210221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353127132 (or 353127129 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121020210221121 its reverse (121122012020121), we get a palindrome (242142222241242).

The spelling of 121020210221121 in words is "one hundred twenty-one trillion, twenty billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".