203131122312 has 32 divisors (see below), whose sum is σ = 511826457600. Its totient is φ = 67177220544.

The previous prime is 203131122289. The next prime is 203131122343. The reversal of 203131122312 is 213221131302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33318987 + ... + 33325082.

It is an arithmetic number, because the mean of its divisors is an integer number (15994576800).

Almost surely, 2^203131122312 is an apocalyptic number.

It is an amenable number.

203131122312 is an abundant number, since it is smaller than the sum of its proper divisors (308695335288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203131122312 is a wasteful number, since it uses less digits than its factorization.

203131122312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66644205 (or 66644201 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 203131122312 its reverse (213221131302), we get a palindrome (416352253614).

The spelling of 203131122312 in words is "two hundred three billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred twelve".