20203131031231 has 2 divisors, whose sum is σ = 20203131031232. Its totient is φ = 20203131031230.

The previous prime is 20203131031217. The next prime is 20203131031243. The reversal of 20203131031231 is 13213013130202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20203131031231 - 2⁷ = 20203131031103 is a prime.

It is a super-2 number, since 2×20203131031231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203131031261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101565515615 + 10101565515616.

It is an arithmetic number, because the mean of its divisors is an integer number (10101565515616).

Almost surely, 2^{20203131031231} is an apocalyptic number.

20203131031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203131031231 is an equidigital number, since it uses as much as digits as its factorization.

20203131031231 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 20203131031231 its reverse (13213013130202), we get a palindrome (33416144161433).

The spelling of 20203131031231 in words is "twenty trillion, two hundred three billion, one hundred thirty-one million, thirty-one thousand, two hundred thirty-one".