20111112220212 has 144 divisors (see below), whose sum is σ = 56957146227072. Its totient is φ = 6168136106880.

The previous prime is 20111112220193. The next prime is 20111112220229. The reversal of 20111112220212 is 21202221111102.

20111112220212 is a `hidden beast` number, since 201 + 111 + 122 + 20 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1370998 + ... + 6488594.

It is an arithmetic number, because the mean of its divisors is an integer number (395535737688).

Almost surely, 2^{20111112220212} 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 20111112220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28478573113536).

20111112220212 is an abundant number, since it is smaller than the sum of its proper divisors (36846034006860).

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

20111112220212 is a wasteful number, since it uses less digits than its factorization.

20111112220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117940 (or 5117926 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20111112220212 its reverse (21202221111102), we get a palindrome (41313333331314).

The spelling of 20111112220212 in words is "twenty trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty thousand, two hundred twelve".