20203131323101 has 2 divisors, whose sum is σ = 20203131323102. Its totient is φ = 20203131323100.

The previous prime is 20203131323087. The next prime is 20203131323131. The reversal of 20203131323101 is 10132313130202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12629131955001 + 7573999368100 = 3553749^2 + 2752090^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203131323101 - 2²⁹ = 20202594452189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203131323131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101565661550 + 10101565661551.

It is an arithmetic number, because the mean of its divisors is an integer number (10101565661551).

Almost surely, 2^{20203131323101} is an apocalyptic number.

It is an amenable number.

20203131323101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203131323101 is an equidigital number, since it uses as much as digits as its factorization.

20203131323101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20203131323101 its reverse (10132313130202), we get a palindrome (30335444453303).

The spelling of 20203131323101 in words is "twenty trillion, two hundred three billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred one".