31230203212 has 48 divisors (see below), whose sum is σ = 60492060160. Its totient is φ = 14018951232.

The previous prime is 31230203203. The next prime is 31230203267. The reversal of 31230203212 is 21230203213.

It is a self number, because there is not a number n which added to its sum of digits gives 31230203212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218503 + ... + 331969.

Almost surely, 2^31230203212 is an apocalyptic number.

It is an amenable number.

31230203212 is a deficient number, since it is larger than the sum of its proper divisors (29261856948).

31230203212 is a wasteful number, since it uses less digits than its factorization.

31230203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113630 (or 113628 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31230203212 its reverse (21230203213), we get a palindrome (52460406425).

Subtracting from 31230203212 its reverse (21230203213), we obtain a palindrome (9999999999).

The spelling of 31230203212 in words is "thirty-one billion, two hundred thirty million, two hundred three thousand, two hundred twelve".