2112212003221 has 4 divisors (see below), whose sum is σ = 2112737302444. Its totient is φ = 2111686704000.

The previous prime is 2112212003179. The next prime is 2112212003243. The reversal of 2112212003221 is 1223002122112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 642089703025 + 1470122300196 = 801305^2 + 1212486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112212003221 - 2⁷ = 2112212003093 is a prime.

It is a super-2 number, since 2×2112212003221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112212013221) by changing a digit.

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, 262643580 + ... + 262651621.

It is an arithmetic number, because the mean of its divisors is an integer number (528184325611).

Almost surely, 2^{2112212003221} is an apocalyptic number.

It is an amenable number.

2112212003221 is a deficient number, since it is larger than the sum of its proper divisors (525299223).

2112212003221 is an equidigital number, since it uses as much as digits as its factorization.

2112212003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525299222.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2112212003221 its reverse (1223002122112), we get a palindrome (3335214125333).

The spelling of 2112212003221 in words is "two trillion, one hundred twelve billion, two hundred twelve million, three thousand, two hundred twenty-one".