203112112131 has 24 divisors (see below), whose sum is σ = 306163821600. Its totient is φ = 129510686976.

The previous prime is 203112112129. The next prime is 203112112141. The reversal of 203112112131 is 131211211302.

It is not a de Polignac number, because 203112112131 - 2¹ = 203112112129 is a prime.

It is a super-2 number, since 2×203112112131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203112112141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3354235 + ... + 3414251.

It is an arithmetic number, because the mean of its divisors is an integer number (12756825900).

Almost surely, 2^203112112131 is an apocalyptic number.

203112112131 is a deficient number, since it is larger than the sum of its proper divisors (103051709469).

203112112131 is a wasteful number, since it uses less digits than its factorization.

203112112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76395 (or 76392 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 203112112131 its reverse (131211211302), we get a palindrome (334323323433).

The spelling of 203112112131 in words is "two hundred three billion, one hundred twelve million, one hundred twelve thousand, one hundred thirty-one".