20012112212112 has 30 divisors (see below), whose sum is σ = 56006119594022. Its totient is φ = 6670704070656.

The previous prime is 20012112212111. The next prime is 20012112212167. The reversal of 20012112212112 is 21121221121002.

20012112212112 is a `hidden beast` number, since 20 + 0 + 1 + 211 + 221 + 211 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19938868367616 + 73243844496 = 4465296^2 + 270636^2 .

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 (20012112212111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69486500593 + ... + 69486500880.

Almost surely, 2^{20012112212112} is an apocalyptic number.

It is an amenable number.

20012112212112 is an abundant number, since it is smaller than the sum of its proper divisors (35994007381910).

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

20012112212112 is a wasteful number, since it uses less digits than its factorization.

20012112212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138973001487 (or 138973001478 counting only the distinct ones).

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

Adding to 20012112212112 its reverse (21121221121002), we get a palindrome (41133333333114).

The spelling of 20012112212112 in words is "twenty trillion, twelve billion, one hundred twelve million, two hundred twelve thousand, one hundred twelve".