20203203311121 has 16 divisors (see below), whose sum is σ = 28356755005440. Its totient is φ = 12759296009040.

The previous prime is 20203203311023. The next prime is 20203203311209. The reversal of 20203203311121 is 12111330230202.

It is a de Polignac number, because none of the positive numbers 2^k-20203203311121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20203203321121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7455885 + ... + 9797786.

It is an arithmetic number, because the mean of its divisors is an integer number (1772297187840).

Almost surely, 2^{20203203311121} is an apocalyptic number.

It is an amenable number.

20203203311121 is a deficient number, since it is larger than the sum of its proper divisors (8153551694319).

20203203311121 is a wasteful number, since it uses less digits than its factorization.

20203203311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17274236.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20203203311121 its reverse (12111330230202), we get a palindrome (32314533541323).

The spelling of 20203203311121 in words is "twenty trillion, two hundred three billion, two hundred three million, three hundred eleven thousand, one hundred twenty-one".