20312220111012 has 96 divisors (see below), whose sum is σ = 53917767657600. Its totient is φ = 6609381359616.

The previous prime is 20312220110933. The next prime is 20312220111019. The reversal of 20312220111012 is 21011102221302.

20312220111012 is a `hidden beast` number, since 20 + 312 + 220 + 1 + 110 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20312220111019) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6592164 + ... + 9169572.

It is an arithmetic number, because the mean of its divisors is an integer number (561643413100).

Almost surely, 2^{20312220111012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312220111012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26958883828800).

20312220111012 is an abundant number, since it is smaller than the sum of its proper divisors (33605547546588).

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

20312220111012 is a wasteful number, since it uses less digits than its factorization.

20312220111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579162 (or 2579154 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20312220111012 its reverse (21011102221302), we get a palindrome (41323322332314).

The spelling of 20312220111012 in words is "twenty trillion, three hundred twelve billion, two hundred twenty million, one hundred eleven thousand, twelve".