12012222001 has 8 divisors (see below), whose sum is σ = 12982279464. Its totient is φ = 11048741760.

The previous prime is 12012221987. The next prime is 12012222011. The reversal of 12012222001 is 10022221021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1757621776 + 10254600225 = 41924^2 + 101265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12012222001 - 2⁷ = 12012221873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012222011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1640506 + ... + 1647811.

It is an arithmetic number, because the mean of its divisors is an integer number (1622784933).

Almost surely, 2^12012222001 is an apocalyptic number.

It is an amenable number.

12012222001 is a deficient number, since it is larger than the sum of its proper divisors (970057463).

12012222001 is a wasteful number, since it uses less digits than its factorization.

12012222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288611.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12012222001 its reverse (10022221021), we get a palindrome (22034443022).

The spelling of 12012222001 in words is "twelve billion, twelve million, two hundred twenty-two thousand, one".