12122221201 has 4 divisors (see below), whose sum is σ = 12129998400. Its totient is φ = 12114444004.

The previous prime is 12122221151. The next prime is 12122221219. The reversal of 12122221201 is 10212222121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10212222121 = 3209 ⋅3182369.

It is a cyclic number.

It is not a de Polignac number, because 12122221201 - 2²⁹ = 11585350289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122221301) 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, 3886261 + ... + 3889378.

It is an arithmetic number, because the mean of its divisors is an integer number (3032499600).

Almost surely, 2^12122221201 is an apocalyptic number.

It is an amenable number.

12122221201 is a deficient number, since it is larger than the sum of its proper divisors (7777199).

12122221201 is an equidigital number, since it uses as much as digits as its factorization.

12122221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777198.

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

Adding to 12122221201 its reverse (10212222121), we get a palindrome (22334443322).

It can be divided in two parts, 1212222120 and 1, that added together give a palindrome (1212222121).

The spelling of 12122221201 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred one".