31103144012 has 12 divisors (see below), whose sum is σ = 54435103800. Its totient is φ = 15550257216.

The previous prime is 31103143991. The next prime is 31103144057. The reversal of 31103144012 is 21044130113.

It is a super-2 number, since 2×31103144012² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 274478 + ... + 370869.

It is an arithmetic number, because the mean of its divisors is an integer number (4536258650).

Almost surely, 2^31103144012 is an apocalyptic number.

It is an amenable number.

31103144012 is a deficient number, since it is larger than the sum of its proper divisors (23331959788).

31103144012 is a wasteful number, since it uses less digits than its factorization.

31103144012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657400 (or 657398 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31103144012 its reverse (21044130113), we get a palindrome (52147274125).

The spelling of 31103144012 in words is "thirty-one billion, one hundred three million, one hundred forty-four thousand, twelve".