121220202100121 has 8 divisors (see below), whose sum is σ = 123105449976480. Its totient is φ = 119337189257088.

The previous prime is 121220202100117. The next prime is 121220202100219. The reversal of 121220202100121 is 121001202022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121220202100121 - 2² = 121220202100117 is a prime.

It is a super-3 number, since 3×121220202100121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121220202100121.

It is not an unprimeable number, because it can be changed into a prime (121220202102121) 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 7 ways as a sum of consecutive naturals, for example, 558649016 + ... + 558865961.

It is an arithmetic number, because the mean of its divisors is an integer number (15388181247060).

Almost surely, 2^{121220202100121} is an apocalyptic number.

It is an amenable number.

121220202100121 is a deficient number, since it is larger than the sum of its proper divisors (1885247876359).

121220202100121 is a wasteful number, since it uses less digits than its factorization.

121220202100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117516663.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121220202100121 its reverse (121001202022121), we get a palindrome (242221404122242).

The spelling of 121220202100121 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred thousand, one hundred twenty-one".