12216022201 has 4 divisors (see below), whose sum is σ = 12513974004. Its totient is φ = 11918070400.

The previous prime is 12216022187. The next prime is 12216022211. The reversal of 12216022201 is 10222061221.

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 2404921600 + 9811100601 = 49040^2 + 99051^2 .

It is a cyclic number.

It is not a de Polignac number, because 12216022201 - 2¹⁹ = 12215497913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12216022211) 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, 148975840 + ... + 148975921.

It is an arithmetic number, because the mean of its divisors is an integer number (3128493501).

Almost surely, 2^12216022201 is an apocalyptic number.

It is an amenable number.

12216022201 is a deficient number, since it is larger than the sum of its proper divisors (297951803).

12216022201 is an equidigital number, since it uses as much as digits as its factorization.

12216022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297951802.

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

Adding to 12216022201 its reverse (10222061221), we get a palindrome (22438083422).

The spelling of 12216022201 in words is "twelve billion, two hundred sixteen million, twenty-two thousand, two hundred one".