12122222001 has 4 divisors (see below), whose sum is σ = 16162962672. Its totient is φ = 8081481332.

The previous prime is 12122221981. The next prime is 12122222027. The reversal of 12122222001 is 10022222121.

12122222001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12122222001 - 2⁷ = 12122221873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020370331 + ... + 2020370336.

It is an arithmetic number, because the mean of its divisors is an integer number (4040740668).

Almost surely, 2^12122222001 is an apocalyptic number.

It is an amenable number.

12122222001 is a deficient number, since it is larger than the sum of its proper divisors (4040740671).

12122222001 is an equidigital number, since it uses as much as digits as its factorization.

12122222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040740670.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12122222001 its reverse (10022222121), we get a palindrome (22144444122).

The spelling of 12122222001 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, one".