212112222001 has 8 divisors (see below), whose sum is σ = 216706527464. Its totient is φ = 207553950720.

The previous prime is 212112221999. The next prime is 212112222067. The reversal of 212112222001 is 100222211212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9793081600 + 202319140401 = 98960^2 + 449799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212112222001 - 2¹ = 212112221999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212152222001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8996646 + ... + 9020191.

It is an arithmetic number, because the mean of its divisors is an integer number (27088315933).

Almost surely, 2^212112222001 is an apocalyptic number.

It is an amenable number.

212112222001 is a deficient number, since it is larger than the sum of its proper divisors (4594305463).

212112222001 is a wasteful number, since it uses less digits than its factorization.

212112222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18017091.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212112222001 its reverse (100222211212), we get a palindrome (312334433213).

The spelling of 212112222001 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty-two thousand, one".