121200201110121 has 64 divisors (see below), whose sum is σ = 197307029606400. Its totient is φ = 64597748576256.

The previous prime is 121200201110083. The next prime is 121200201110123. The reversal of 121200201110121 is 121011102002121.

It is a happy number.

It is not a de Polignac number, because 121200201110121 - 2⁷ = 121200201109993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121200201110121.

It is not an unprimeable number, because it can be changed into a prime (121200201110123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 304738890 + ... + 305136348.

It is an arithmetic number, because the mean of its divisors is an integer number (3082922337600).

Almost surely, 2^{121200201110121} is an apocalyptic number.

It is an amenable number.

121200201110121 is a deficient number, since it is larger than the sum of its proper divisors (76106828496279).

121200201110121 is a wasteful number, since it uses less digits than its factorization.

121200201110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405158.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121200201110121 its reverse (121011102002121), we get a palindrome (242211303112242).

The spelling of 121200201110121 in words is "one hundred twenty-one trillion, two hundred billion, two hundred one million, one hundred ten thousand, one hundred twenty-one".