20112111122212 has 12 divisors (see below), whose sum is σ = 35208618131596. Its totient is φ = 10052505941760.

The previous prime is 20112111122197. The next prime is 20112111122221. The reversal of 20112111122212 is 21222111121102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15170666662116 + 4941444460096 = 3894954^2 + 2222936^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20112111122212.

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 3 ways as a sum of consecutive naturals, for example, 887392089 + ... + 887414752.

Almost surely, 2^{20112111122212} is an apocalyptic number.

It is an amenable number.

20112111122212 is a deficient number, since it is larger than the sum of its proper divisors (15096507009384).

20112111122212 is a wasteful number, since it uses less digits than its factorization.

20112111122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774809678 (or 1774809676 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20112111122212 its reverse (21222111121102), we get a palindrome (41334222243314).

The spelling of 20112111122212 in words is "twenty trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twelve".