31203230212 has 48 divisors (see below), whose sum is σ = 68320530432. Its totient is φ = 12114110880.

The previous prime is 31203230189. The next prime is 31203230221. The reversal of 31203230212 is 21203230213.

It is a self number, because there is not a number n which added to its sum of digits gives 31203230212.

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, 91828 + ... + 266155.

It is an arithmetic number, because the mean of its divisors is an integer number (1423344384).

Almost surely, 2^31203230212 is an apocalyptic number.

It is an amenable number.

31203230212 is an abundant number, since it is smaller than the sum of its proper divisors (37117300220).

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

31203230212 is a wasteful number, since it uses less digits than its factorization.

31203230212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358288 (or 358286 counting only the distinct ones).

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

Adding to 31203230212 its reverse (21203230213), we get a palindrome (52406460425).

Subtracting from 31203230212 its reverse (21203230213), we obtain a palindrome (9999999999).

The spelling of 31203230212 in words is "thirty-one billion, two hundred three million, two hundred thirty thousand, two hundred twelve".