12211320001 has 4 divisors (see below), whose sum is σ = 12211542100. Its totient is φ = 12211097904.

The previous prime is 12211319977. The next prime is 12211320013. The reversal of 12211320001 is 10002311221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10002311221 = 7 ⋅1428901603.

It can be written as a sum of positive squares in 2 ways, for example, as 5718989376 + 6492330625 = 75624^2 + 80575^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211320001 - 2¹⁷ = 12211188929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211320071) 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, 39055 + ... + 161083.

It is an arithmetic number, because the mean of its divisors is an integer number (3052885525).

Almost surely, 2^12211320001 is an apocalyptic number.

It is an amenable number.

12211320001 is a deficient number, since it is larger than the sum of its proper divisors (222099).

12211320001 is a wasteful number, since it uses less digits than its factorization.

12211320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222098.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12211320001 its reverse (10002311221), we get a palindrome (22213631222).

The spelling of 12211320001 in words is "twelve billion, two hundred eleven million, three hundred twenty thousand, one".