31230202212 has 60 divisors (see below), whose sum is σ = 89063920176. Its totient is φ = 9463696560.

The previous prime is 31230202193. The next prime is 31230202271. The reversal of 31230202212 is 21220203213.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 19 ways as a sum of consecutive naturals, for example, 4377778 + ... + 4384905.

Almost surely, 2^31230202212 is an apocalyptic number.

It is an amenable number.

31230202212 is an abundant number, since it is smaller than the sum of its proper divisors (57833717964).

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

31230202212 is a wasteful number, since it uses less digits than its factorization.

31230202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8762710 (or 8762699 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31230202212 its reverse (21220203213), we get a palindrome (52450405425).

The spelling of 31230202212 in words is "thirty-one billion, two hundred thirty million, two hundred two thousand, two hundred twelve".