31123432112 has 10 divisors (see below), whose sum is σ = 60301649748. Its totient is φ = 15561716048.

The previous prime is 31123432103. The next prime is 31123432177. The reversal of 31123432112 is 21123432113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972607238 + ... + 972607269.

Almost surely, 2^31123432112 is an apocalyptic number.

It is an amenable number.

31123432112 is a deficient number, since it is larger than the sum of its proper divisors (29178217636).

31123432112 is a wasteful number, since it uses less digits than its factorization.

31123432112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945214515 (or 1945214509 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 31123432112 its reverse (21123432113), we get a palindrome (52246864225).

Subtracting from 31123432112 its reverse (21123432113), we obtain a palindrome (9999999999).

The spelling of 31123432112 in words is "thirty-one billion, one hundred twenty-three million, four hundred thirty-two thousand, one hundred twelve".