31212320302 has 64 divisors (see below), whose sum is σ = 51131013120. Its totient is φ = 14259369600.

The previous prime is 31212320299. The next prime is 31212320311. The reversal of 31212320302 is 20302321213.

It is a self number, because there is not a number n which added to its sum of digits gives 31212320302.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 9593308 + ... + 9596560.

It is an arithmetic number, because the mean of its divisors is an integer number (798922080).

Almost surely, 2^31212320302 is an apocalyptic number.

31212320302 is a deficient number, since it is larger than the sum of its proper divisors (19918692818).

31212320302 is a wasteful number, since it uses less digits than its factorization.

31212320302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449.

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

Adding to 31212320302 its reverse (20302321213), we get a palindrome (51514641515).

The spelling of 31212320302 in words is "thirty-one billion, two hundred twelve million, three hundred twenty thousand, three hundred two".