2221212112112 has 40 divisors (see below), whose sum is σ = 4932098611200. Its totient is φ = 949296364992.

The previous prime is 2221212112099. The next prime is 2221212112243. The reversal of 2221212112112 is 2112112121222.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27581312 + ... + 27661727.

It is an arithmetic number, because the mean of its divisors is an integer number (123302465280).

Almost surely, 2^{2221212112112} is an apocalyptic number.

It is an amenable number.

2221212112112 is an abundant number, since it is smaller than the sum of its proper divisors (2710886499088).

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

2221212112112 is a wasteful number, since it uses less digits than its factorization.

2221212112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55243413 (or 55243407 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 2221212112112 its reverse (2112112121222), we get a palindrome (4333324233334).

The spelling of 2221212112112 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred twelve".