203131312312 has 16 divisors (see below), whose sum is σ = 384642214200. Its totient is φ = 100560055200.

The previous prime is 203131312297. The next prime is 203131312343. The reversal of 203131312312 is 213213131302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125699262 + ... + 125700877.

Almost surely, 2^203131312312 is an apocalyptic number.

It is an amenable number.

203131312312 is a deficient number, since it is larger than the sum of its proper divisors (181510901888).

203131312312 is a wasteful number, since it uses less digits than its factorization.

203131312312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251400246 (or 251400242 counting only the distinct ones).

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

Adding to 203131312312 its reverse (213213131302), we get a palindrome (416344443614).

The spelling of 203131312312 in words is "two hundred three billion, one hundred thirty-one million, three hundred twelve thousand, three hundred twelve".