31142213112 has 64 divisors (see below), whose sum is σ = 82100995200. Its totient is φ = 9816647040.

The previous prime is 31142213101. The next prime is 31142213143. The reversal of 31142213112 is 21131224113.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192687 + ... + 315297.

It is an arithmetic number, because the mean of its divisors is an integer number (1282828050).

Almost surely, 2^31142213112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31142213112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41050497600).

31142213112 is an abundant number, since it is smaller than the sum of its proper divisors (50958782088).

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

31142213112 is a wasteful number, since it uses less digits than its factorization.

31142213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123196 (or 123192 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

Adding to 31142213112 its reverse (21131224113), we get a palindrome (52273437225).

The spelling of 31142213112 in words is "thirty-one billion, one hundred forty-two million, two hundred thirteen thousand, one hundred twelve".