31112121124 has 96 divisors (see below), whose sum is σ = 66391557120. Its totient is φ = 12453322752.

The previous prime is 31112121113. The next prime is 31112121151. The reversal of 31112121124 is 42112121113.

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 in 31 ways as a sum of consecutive naturals, for example, 54678312 + ... + 54678880.

It is an arithmetic number, because the mean of its divisors is an integer number (691578720).

Almost surely, 2^31112121124 is an apocalyptic number.

31112121124 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31112121124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33195778560).

31112121124 is an abundant number, since it is smaller than the sum of its proper divisors (35279435996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31112121124 is a wasteful number, since it uses less digits than its factorization.

31112121124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1275 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 31112121124 its reverse (42112121113), we get a palindrome (73224242237).

The spelling of 31112121124 in words is "thirty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-four".