31203210012 has 48 divisors (see below), whose sum is σ = 78687208992. Its totient is φ = 9566807040.

The previous prime is 31203209981. The next prime is 31203210067. The reversal of 31203210012 is 21001230213.

It is a junction number, because it is equal to n+sod(n) for n = 31203209973 and 31203210000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312073 + ... + 399744.

It is an arithmetic number, because the mean of its divisors is an integer number (1639316854).

Almost surely, 2^31203210012 is an apocalyptic number.

It is an amenable number.

31203210012 is an abundant number, since it is smaller than the sum of its proper divisors (47483998980).

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

31203210012 is a wasteful number, since it uses less digits than its factorization.

31203210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712118 (or 712116 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31203210012 its reverse (21001230213), we get a palindrome (52204440225).

The spelling of 31203210012 in words is "thirty-one billion, two hundred three million, two hundred ten thousand, twelve".