31231112121112 has 48 divisors (see below), whose sum is σ = 60711954717960. Its totient is φ = 15060994760448.

The previous prime is 31231112121029. The next prime is 31231112121169. The reversal of 31231112121112 is 21112121113213.

It is a super-3 number, since 3×31231112121112³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3827103 + ... + 8781169.

Almost surely, 2^{31231112121112} is an apocalyptic number.

It is an amenable number.

31231112121112 is a deficient number, since it is larger than the sum of its proper divisors (29480842596848).

31231112121112 is a wasteful number, since it uses less digits than its factorization.

31231112121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4955068 (or 4955035 counting only the distinct ones).

The product of its digits is 144, while the sum is 22.

Adding to 31231112121112 its reverse (21112121113213), we get a palindrome (52343233234325).

The spelling of 31231112121112 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twelve".