12222312001 has 4 divisors (see below), whose sum is σ = 12865591600. Its totient is φ = 11579032404.

The previous prime is 12222311903. The next prime is 12222312017. The reversal of 12222312001 is 10021322221.

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.

It is a cyclic number.

It is not a de Polignac number, because 12222312001 - 2¹⁵ = 12222279233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12222312041) 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, 321639771 + ... + 321639808.

It is an arithmetic number, because the mean of its divisors is an integer number (3216397900).

Almost surely, 2^12222312001 is an apocalyptic number.

It is an amenable number.

12222312001 is a deficient number, since it is larger than the sum of its proper divisors (643279599).

12222312001 is an equidigital number, since it uses as much as digits as its factorization.

12222312001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643279598.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12222312001 its reverse (10021322221), we get a palindrome (22243634222).

The spelling of 12222312001 in words is "twelve billion, two hundred twenty-two million, three hundred twelve thousand, one".