20312112212 has 12 divisors (see below), whose sum is σ = 40624224480. Its totient is φ = 8705190936.

The previous prime is 20312112187. The next prime is 20312112217. The reversal of 20312112212 is 21221121302.

20312112212 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312112217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 362716262 + ... + 362716317.

It is an arithmetic number, because the mean of its divisors is an integer number (3385352040).

Almost surely, 2^20312112212 is an apocalyptic number.

It is an amenable number.

20312112212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20312112212 is a wasteful number, since it uses less digits than its factorization.

20312112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725432590 (or 725432588 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20312112212 its reverse (21221121302), we get a palindrome (41533233514).

The spelling of 20312112212 in words is "twenty billion, three hundred twelve million, one hundred twelve thousand, two hundred twelve".