212221321201 has 6 divisors (see below), whose sum is σ = 219288005106. Its totient is φ = 205375471200.

The previous prime is 212221321189. The next prime is 212221321217. The reversal of 212221321201 is 102123122212.

It can be written as a sum of positive squares in only one way, i.e., 114092626176 + 98128695025 = 337776^2 + 313255^2 .

It is not a de Polignac number, because 212221321201 - 2²³ = 212212932593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221321801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110415960 + ... + 110417881.

It is an arithmetic number, because the mean of its divisors is an integer number (36548000851).

Almost surely, 2^212221321201 is an apocalyptic number.

It is an amenable number.

212221321201 is a deficient number, since it is larger than the sum of its proper divisors (7066683905).

212221321201 is an equidigital number, since it uses as much as digits as its factorization.

212221321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220833903 (or 220833872 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212221321201 its reverse (102123122212), we get a palindrome (314344443413).

The spelling of 212221321201 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred one".