31321232112 has 20 divisors (see below), whose sum is σ = 80913183080. Its totient is φ = 10440410688.

The previous prime is 31321232101. The next prime is 31321232113. The reversal of 31321232112 is 21123212313.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321232113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326262787 + ... + 326262882.

It is an arithmetic number, because the mean of its divisors is an integer number (4045659154).

Almost surely, 2^31321232112 is an apocalyptic number.

It is an amenable number.

31321232112 is an abundant number, since it is smaller than the sum of its proper divisors (49591950968).

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

31321232112 is a wasteful number, since it uses less digits than its factorization.

31321232112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652525680 (or 652525674 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 31321232112 its reverse (21123212313), we get a palindrome (52444444425).

The spelling of 31321232112 in words is "thirty-one billion, three hundred twenty-one million, two hundred thirty-two thousand, one hundred twelve".