200121012120121 has 8 divisors (see below), whose sum is σ = 200200695018984. Its totient is φ = 200041332019200.

The previous prime is 200121012120109. The next prime is 200121012120157. The reversal of 200121012120121 is 121021210121002.

200121012120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9769625409600 + 190351386710521 = 3125640^2 + 13796789^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 200121012120121 - 2²⁵ = 200120978565689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121012120095 and 200121012120104.

It is not an unprimeable number, because it can be changed into a prime (200121012120521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148718721 + ... + 150058321.

It is an arithmetic number, because the mean of its divisors is an integer number (25025086877373).

Almost surely, 2^{200121012120121} is an apocalyptic number.

It is an amenable number.

200121012120121 is a deficient number, since it is larger than the sum of its proper divisors (79682898863).

200121012120121 is a wasteful number, since it uses less digits than its factorization.

200121012120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398971.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200121012120121 its reverse (121021210121002), we get a palindrome (321142222241123).

The spelling of 200121012120121 in words is "two hundred trillion, one hundred twenty-one billion, twelve million, one hundred twenty thousand, one hundred twenty-one".