31203330013231 has 12 divisors (see below), whose sum is σ = 32725032147360. Its totient is φ = 29734313269920.

The previous prime is 31203330013139. The next prime is 31203330013249. The reversal of 31203330013231 is 13231003330213.

It is not a de Polignac number, because 31203330013231 - 2⁷ = 31203330013103 is a prime.

It is a super-2 number, since 2×31203330013231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31203330013196 and 31203330013205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203330083231) 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 11 ways as a sum of consecutive naturals, for example, 205726471 + ... + 205878088.

It is an arithmetic number, because the mean of its divisors is an integer number (2727086012280).

Almost surely, 2^{31203330013231} is an apocalyptic number.

31203330013231 is a deficient number, since it is larger than the sum of its proper divisors (1521702134129).

31203330013231 is an equidigital number, since it uses as much as digits as its factorization.

31203330013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411604686 (or 411604643 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 31203330013231 its reverse (13231003330213), we get a palindrome (44434333343444).

The spelling of 31203330013231 in words is "thirty-one trillion, two hundred three billion, three hundred thirty million, thirteen thousand, two hundred thirty-one".