31112022112 has 96 divisors (see below), whose sum is σ = 65653822080. Its totient is φ = 14470410240.

The previous prime is 31112022103. The next prime is 31112022119. The reversal of 31112022112 is 21122021113.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112022119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7723843 + ... + 7727869.

It is an arithmetic number, because the mean of its divisors is an integer number (683893980).

Almost surely, 2^31112022112 is an apocalyptic number.

31112022112 is a gapful number since it is divisible by the number (32) 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 31112022112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32826911040).

31112022112 is an abundant number, since it is smaller than the sum of its proper divisors (34541799968).

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

31112022112 is a wasteful number, since it uses less digits than its factorization.

31112022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4284 (or 4276 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31112022112 its reverse (21122021113), we get a palindrome (52234043225).

Subtracting from 31112022112 its reverse (21122021113), we obtain a palindrome (9990000999).

The spelling of 31112022112 in words is "thirty-one billion, one hundred twelve million, twenty-two thousand, one hundred twelve".