212012200221001 has 4 divisors (see below), whose sum is σ = 224483506116372. Its totient is φ = 199540894325632.

The previous prime is 212012200220999. The next prime is 212012200221011. The reversal of 212012200221001 is 100122002210212.

It is a happy number.

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 157695226520976 + 54316973700025 = 12557676^2 + 7370005^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012200221001 - 2¹ = 212012200220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212012200221011) 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, 6235652947660 + ... + 6235652947693.

It is an arithmetic number, because the mean of its divisors is an integer number (56120876529093).

Almost surely, 2^{212012200221001} is an apocalyptic number.

It is an amenable number.

212012200221001 is a deficient number, since it is larger than the sum of its proper divisors (12471305895371).

212012200221001 is a wasteful number, since it uses less digits than its factorization.

212012200221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12471305895370.

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

Adding to 212012200221001 its reverse (100122002210212), we get a palindrome (312134202431213).

The spelling of 212012200221001 in words is "two hundred twelve trillion, twelve billion, two hundred million, two hundred twenty-one thousand, one".