2221211212112 has 20 divisors (see below), whose sum is σ = 4325895158100. Its totient is φ = 1104851171328.

The previous prime is 2221211212093. The next prime is 2221211212133. The reversal of 2221211212112 is 2112121121222.

It can be written as a sum of positive squares in 2 ways, for example, as 1596422142016 + 624789070096 = 1263496^2 + 790436^2 .

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359648987 + ... + 359655162.

It is an arithmetic number, because the mean of its divisors is an integer number (216294757905).

Almost surely, 2^{2221211212112} is an apocalyptic number.

It is an amenable number.

2221211212112 is a deficient number, since it is larger than the sum of its proper divisors (2104683945988).

2221211212112 is a wasteful number, since it uses less digits than its factorization.

2221211212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719304350 (or 719304344 counting only the distinct ones).

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

Adding to 2221211212112 its reverse (2112121121222), we get a palindrome (4333332333334).

The spelling of 2221211212112 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred twelve".