2112111212201 has 4 divisors (see below), whose sum is σ = 2112207938004. Its totient is φ = 2112014486400.

The previous prime is 2112111212179. The next prime is 2112111212251. The reversal of 2112111212201 is 1022121112112.

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 43982478400 + 2068128733801 = 209720^2 + 1438099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112111212201 is a prime.

It is a super-2 number, since 2×2112111212201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112111212201.

It is not an unprimeable number, because it can be changed into a prime (2112111212251) 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, 48330140 + ... + 48373821.

It is an arithmetic number, because the mean of its divisors is an integer number (528051984501).

Almost surely, 2^{2112111212201} is an apocalyptic number.

It is an amenable number.

2112111212201 is a deficient number, since it is larger than the sum of its proper divisors (96725803).

2112111212201 is an equidigital number, since it uses as much as digits as its factorization.

2112111212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96725802.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2112111212201 its reverse (1022121112112), we get a palindrome (3134232324313).

The spelling of 2112111212201 in words is "two trillion, one hundred twelve billion, one hundred eleven million, two hundred twelve thousand, two hundred one".