2112222212101 has 4 divisors (see below), whose sum is σ = 2146848805804. Its totient is φ = 2077595618400.

The previous prime is 2112222212057. The next prime is 2112222212173. The reversal of 2112222212101 is 1012122222112.

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 904144248225 + 1208077963876 = 950865^2 + 1099126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112222212101 - 2¹¹ = 2112222210053 is a prime.

It is a super-2 number, since 2×2112222212101² (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 (2112222812101) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17313296760 + ... + 17313296881.

It is an arithmetic number, because the mean of its divisors is an integer number (536712201451).

Almost surely, 2^{2112222212101} is an apocalyptic number.

It is an amenable number.

2112222212101 is a deficient number, since it is larger than the sum of its proper divisors (34626593703).

2112222212101 is an equidigital number, since it uses as much as digits as its factorization.

2112222212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34626593702.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2112222212101 its reverse (1012122222112), we get a palindrome (3124344434213).

The spelling of 2112222212101 in words is "two trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twelve thousand, one hundred one".