2000203203121 has 4 divisors (see below), whose sum is σ = 2000303428644. Its totient is φ = 2000102977600.

The previous prime is 2000203203091. The next prime is 2000203203127. The reversal of 2000203203121 is 1213023020002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1654413337600 + 345789865521 = 1286240^2 + 588039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000203203121 - 2²⁵ = 2000169648689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2000203203095 and 2000203203104.

It is not an unprimeable number, because it can be changed into a prime (2000203203127) 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, 50082820 + ... + 50122741.

It is an arithmetic number, because the mean of its divisors is an integer number (500075857161).

Almost surely, 2^{2000203203121} is an apocalyptic number.

It is an amenable number.

2000203203121 is a deficient number, since it is larger than the sum of its proper divisors (100225523).

2000203203121 is a wasteful number, since it uses less digits than its factorization.

2000203203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100225522.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 2000203203121 its reverse (1213023020002), we get a palindrome (3213226223123).

The spelling of 2000203203121 in words is "two trillion, two hundred three million, two hundred three thousand, one hundred twenty-one".