200120200000121 has 4 divisors (see below), whose sum is σ = 200120229981072. Its totient is φ = 200120170019172.

The previous prime is 200120200000001. The next prime is 200120200000151. The reversal of 200120200000121 is 121000002021002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 200120200000121 - 2²⁶ = 200120132891257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200120200000151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56366 + ... + 20006088.

It is an arithmetic number, because the mean of its divisors is an integer number (50030057495268).

Almost surely, 2^{200120200000121} is an apocalyptic number.

It is an amenable number.

200120200000121 is a deficient number, since it is larger than the sum of its proper divisors (29980951).

200120200000121 is a wasteful number, since it uses less digits than its factorization.

200120200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29980950.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200120200000121 its reverse (121000002021002), we get a palindrome (321120202021123).

The spelling of 200120200000121 in words is "two hundred trillion, one hundred twenty billion, two hundred million, one hundred twenty-one", and thus it is an aban number.