20030203121 has 8 divisors (see below), whose sum is σ = 20155809960. Its totient is φ = 19904935552.

The previous prime is 20030203103. The next prime is 20030203129. The reversal of 20030203121 is 12130203002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26061025 + 20004142096 = 5105^2 + 141436^2 .

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 20030203121 - 2³⁰ = 18956461297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20030203096 and 20030203105.

It is not an unprimeable number, because it can be changed into a prime (20030203129) 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 7 ways as a sum of consecutive naturals, for example, 34151 + ... + 203043.

It is an arithmetic number, because the mean of its divisors is an integer number (2519476245).

Almost surely, 2^20030203121 is an apocalyptic number.

It is an amenable number.

20030203121 is a deficient number, since it is larger than the sum of its proper divisors (125606839).

20030203121 is a wasteful number, since it uses less digits than its factorization.

20030203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169635.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20030203121 its reverse (12130203002), we get a palindrome (32160406123).

The spelling of 20030203121 in words is "twenty billion, thirty million, two hundred three thousand, one hundred twenty-one".