212221102201 has 4 divisors (see below), whose sum is σ = 214168084900. Its totient is φ = 210274119504.

The previous prime is 212221102193. The next prime is 212221102211. The reversal of 212221102201 is 102201122212.

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 138421946601 + 73799155600 = 372051^2 + 271660^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221102201 - 2³ = 212221102193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221102211) 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, 973491186 + ... + 973491403.

It is an arithmetic number, because the mean of its divisors is an integer number (53542021225).

Almost surely, 2^212221102201 is an apocalyptic number.

It is an amenable number.

212221102201 is a deficient number, since it is larger than the sum of its proper divisors (1946982699).

212221102201 is a wasteful number, since it uses less digits than its factorization.

212221102201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946982698.

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

Adding to 212221102201 its reverse (102201122212), we get a palindrome (314422224413).

The spelling of 212221102201 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred two thousand, two hundred one".