31233313212 has 12 divisors (see below), whose sum is σ = 72877730856. Its totient is φ = 10411104400.

The previous prime is 31233313211. The next prime is 31233313219. The reversal of 31233313212 is 21231333213.

It is a tau number, because it is divible by the number of its divisors (12).

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 (31233313211) 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, 1301388039 + ... + 1301388062.

It is an arithmetic number, because the mean of its divisors is an integer number (6073144238).

Almost surely, 2^31233313212 is an apocalyptic number.

It is an amenable number.

31233313212 is an abundant number, since it is smaller than the sum of its proper divisors (41644417644).

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

31233313212 is a wasteful number, since it uses less digits than its factorization.

31233313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602776108 (or 2602776106 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 31233313212 its reverse (21231333213), we get a palindrome (52464646425).

The spelling of 31233313212 in words is "thirty-one billion, two hundred thirty-three million, three hundred thirteen thousand, two hundred twelve".