121221230112101 has 6 divisors (see below), whose sum is σ = 141012451354950. Its totient is φ = 103903911524616.

The previous prime is 121221230112011. The next prime is 121221230112139. The reversal of 121221230112101 is 101211032122121.

It can be written as a sum of positive squares in only one way, i.e., 105807761964100 + 15413468148001 = 10286290^2 + 3925999^2 .

It is not a de Polignac number, because 121221230112101 - 2³⁴ = 121204050242917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221230111101) 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 5 ways as a sum of consecutive naturals, for example, 1236951327626 + ... + 1236951327723.

It is an arithmetic number, because the mean of its divisors is an integer number (23502075225825).

Almost surely, 2^{121221230112101} is an apocalyptic number.

It is an amenable number.

121221230112101 is a deficient number, since it is larger than the sum of its proper divisors (19791221242849).

121221230112101 is an equidigital number, since it uses as much as digits as its factorization.

121221230112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473902655363 (or 2473902655356 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121221230112101 its reverse (101211032122121), we get a palindrome (222432262234222).

The spelling of 121221230112101 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred thirty million, one hundred twelve thousand, one hundred one".