212221220201 has 8 divisors (see below), whose sum is σ = 213056481960. Its totient is φ = 211387502592.

The previous prime is 212221220191. The next prime is 212221220287. The reversal of 212221220201 is 102022122212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 114177085801 + 98044134400 = 337901^2 + 313120^2 .

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 212221220201 - 2²² = 212217025897 is a prime.

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 212221220201.

It is not an unprimeable number, because it can be changed into a prime (212221220801) 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, 110240 + ... + 660753.

It is an arithmetic number, because the mean of its divisors is an integer number (26632060245).

Almost surely, 2^212221220201 is an apocalyptic number.

It is an amenable number.

212221220201 is a deficient number, since it is larger than the sum of its proper divisors (835261759).

212221220201 is an equidigital number, since it uses as much as digits as its factorization.

212221220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772075.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212221220201 its reverse (102022122212), we get a palindrome (314243342413).

The spelling of 212221220201 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, two hundred one".