31000020112 has 20 divisors (see below), whose sum is σ = 61340466816. Its totient is φ = 15170222240.

The previous prime is 31000020109. The next prime is 31000020113. The reversal of 31000020112 is 21102000013.

It is a super-2 number, since 2×31000020112² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31000020113) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 20610964 + ... + 20612467.

Almost surely, 2^31000020112 is an apocalyptic number.

It is an amenable number.

31000020112 is a deficient number, since it is larger than the sum of its proper divisors (30340446704).

31000020112 is a wasteful number, since it uses less digits than its factorization.

31000020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41223486 (or 41223480 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31000020112 its reverse (21102000013), we get a palindrome (52102020125).

The spelling of 31000020112 in words is "thirty-one billion, twenty thousand, one hundred twelve".