121000220121 has 16 divisors (see below), whose sum is σ = 180293012928. Its totient is φ = 71544844800.

The previous prime is 121000220083. The next prime is 121000220147. The reversal of 121000220121 is 121022000121.

It is not a de Polignac number, because 121000220121 - 2³⁰ = 119926478297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000220097 and 121000220106.

It is not an unprimeable number, because it can be changed into a prime (121000220161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44714176 + ... + 44716881.

It is an arithmetic number, because the mean of its divisors is an integer number (11268313308).

Almost surely, 2^121000220121 is an apocalyptic number.

121000220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121000220121 is a deficient number, since it is larger than the sum of its proper divisors (59292792807).

121000220121 is a wasteful number, since it uses less digits than its factorization.

121000220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89431112.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121000220121 its reverse (121022000121), we get a palindrome (242022220242).

The spelling of 121000220121 in words is "one hundred twenty-one billion, two hundred twenty thousand, one hundred twenty-one".