200000000121 has 24 divisors (see below), whose sum is σ = 269767817472. Its totient is φ = 131800152000.

The previous prime is 200000000093. The next prime is 200000000129. The reversal of 200000000121 is 121000000002.

It is a happy number.

It is not a de Polignac number, because 200000000121 - 2³⁴ = 182820130937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200000000129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20223640 + ... + 20233526.

It is an arithmetic number, because the mean of its divisors is an integer number (11240325728).

Almost surely, 2^200000000121 is an apocalyptic number.

It is an amenable number.

200000000121 is a deficient number, since it is larger than the sum of its proper divisors (69767817351).

200000000121 is an equidigital number, since it uses as much as digits as its factorization.

200000000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10753 (or 10652 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 200000000121 its reverse (121000000002), we get a palindrome (321000000123).

The spelling of 200000000121 in words is "two hundred billion, one hundred twenty-one", and thus it is an aban number.