20000200121 has 4 divisors (see below), whose sum is σ = 21818400144. Its totient is φ = 18182000100.

The previous prime is 20000200097. The next prime is 20000200123. The reversal of 20000200121 is 12100200002.

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.

It is not a de Polignac number, because 20000200121 - 2³⁴ = 2820330937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20000200099 and 20000200108.

It is not an unprimeable number, because it can be changed into a prime (20000200123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909099995 + ... + 909100016.

It is an arithmetic number, because the mean of its divisors is an integer number (5454600036).

Almost surely, 2^20000200121 is an apocalyptic number.

It is an amenable number.

20000200121 is a deficient number, since it is larger than the sum of its proper divisors (1818200023).

20000200121 is a wasteful number, since it uses less digits than its factorization.

20000200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818200022.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20000200121 its reverse (12100200002), we get a palindrome (32100400123).

The spelling of 20000200121 in words is "twenty billion, two hundred thousand, one hundred twenty-one".