20131321203203 has 16 divisors (see below), whose sum is σ = 23092714352640. Its totient is φ = 17191303855200.

The previous prime is 20131321203197. The next prime is 20131321203233. The reversal of 20131321203203 is 30230212313102.

It is a cyclic number.

It is not a de Polignac number, because 20131321203203 - 2⁴⁴ = 2539135158787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131321203233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89272133 + ... + 89497353.

It is an arithmetic number, because the mean of its divisors is an integer number (1443294647040).

Almost surely, 2^{20131321203203} is an apocalyptic number.

20131321203203 is a deficient number, since it is larger than the sum of its proper divisors (2961393149437).

20131321203203 is a wasteful number, since it uses less digits than its factorization.

20131321203203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272618.

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

Adding to 20131321203203 its reverse (30230212313102), we get a palindrome (50361533516305).

The spelling of 20131321203203 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-one million, two hundred three thousand, two hundred three".