12031071903 has 12 divisors (see below), whose sum is σ = 17400823440. Its totient is φ = 8010279936.

The previous prime is 12031071881. The next prime is 12031071911. The reversal of 12031071903 is 30917013021.

It is not a de Polignac number, because 12031071903 - 2⁶ = 12031071839 is a prime.

It is a super-2 number, since 2×12031071903² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031071803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 862251 + ... + 876092.

It is an arithmetic number, because the mean of its divisors is an integer number (1450068620).

Almost surely, 2^12031071903 is an apocalyptic number.

12031071903 is a deficient number, since it is larger than the sum of its proper divisors (5369751537).

12031071903 is a wasteful number, since it uses less digits than its factorization.

12031071903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739118 (or 1739115 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

Adding to 12031071903 its reverse (30917013021), we get a palindrome (42948084924).

The spelling of 12031071903 in words is "twelve billion, thirty-one million, seventy-one thousand, nine hundred three".