31203320122212 has 96 divisors (see below), whose sum is σ = 85464643423488. Its totient is φ = 8673581481984.

The previous prime is 31203320122193. The next prime is 31203320122217. The reversal of 31203320122212 is 21222102330213.

It is not an unprimeable number, because it can be changed into a prime (31203320122217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38690188 + ... + 39488444.

It is an arithmetic number, because the mean of its divisors is an integer number (890256702328).

Almost surely, 2^{31203320122212} is an apocalyptic number.

It is an amenable number.

31203320122212 is an abundant number, since it is smaller than the sum of its proper divisors (54261323301276).

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

31203320122212 is a wasteful number, since it uses less digits than its factorization.

31203320122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810885 (or 810883 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31203320122212 its reverse (21222102330213), we get a palindrome (52425422452425).

The spelling of 31203320122212 in words is "thirty-one trillion, two hundred three billion, three hundred twenty million, one hundred twenty-two thousand, two hundred twelve".