212112120000001 has 4 divisors (see below), whose sum is σ = 228428436923092. Its totient is φ = 195795803076912.

The previous prime is 212112119999893. The next prime is 212112120000013. The reversal of 212112120000001 is 100000021211212.

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 98050574398401 + 114061545601600 = 9902049^2 + 10679960^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112120000001 - 2⁹ = 212112119999489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16316316923077 = 212112120000001 / (2 + 1 + 2 + 1 + 1 + 2 + 1 + 2 + 0 + 0 + 0 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212112120000901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8158158461526 + ... + 8158158461551.

It is an arithmetic number, because the mean of its divisors is an integer number (57107109230773).

Almost surely, 2^{212112120000001} is an apocalyptic number.

It is an amenable number.

212112120000001 is a deficient number, since it is larger than the sum of its proper divisors (16316316923091).

212112120000001 is a wasteful number, since it uses less digits than its factorization.

212112120000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316316923090.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212112120000001 its reverse (100000021211212), we get a palindrome (312112141211213).

The spelling of 212112120000001 in words is "two hundred twelve trillion, one hundred twelve billion, one hundred twenty million, one", and thus it is an aban number.