20203203331121 has 4 divisors (see below), whose sum is σ = 20392018315632. Its totient is φ = 20014388346612.

The previous prime is 20203203331117. The next prime is 20203203331139. The reversal of 20203203331121 is 12113330230202.

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 a cyclic number.

It is not a de Polignac number, because 20203203331121 - 2² = 20203203331117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203203331151) 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, 94407492095 + ... + 94407492308.

It is an arithmetic number, because the mean of its divisors is an integer number (5098004578908).

Almost surely, 2^{20203203331121} is an apocalyptic number.

It is an amenable number.

20203203331121 is a deficient number, since it is larger than the sum of its proper divisors (188814984511).

20203203331121 is a wasteful number, since it uses less digits than its factorization.

20203203331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188814984510.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20203203331121 its reverse (12113330230202), we get a palindrome (32316533561323).

The spelling of 20203203331121 in words is "twenty trillion, two hundred three billion, two hundred three million, three hundred thirty-one thousand, one hundred twenty-one".