2212121112112 has 20 divisors (see below), whose sum is σ = 4424242225216. Its totient is φ = 1070381183040.

The previous prime is 2212121112041. The next prime is 2212121112119. The reversal of 2212121112112 is 2112111212122.

It is a happy number.

2212121112112 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2212121112112.

It is not an unprimeable number, because it can be changed into a prime (2212121112119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2229960303 + ... + 2229961294.

Almost surely, 2^{2212121112112} is an apocalyptic number.

It is an amenable number.

2212121112112 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.

2212121112112 is a wasteful number, since it uses less digits than its factorization.

2212121112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4459921636 (or 4459921630 counting only the distinct ones).

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

Adding to 2212121112112 its reverse (2112111212122), we get a palindrome (4324232324234).

The spelling of 2212121112112 in words is "two trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twelve".