12001222221101 has 4 divisors (see below), whose sum is σ = 12002175543900. Its totient is φ = 12000268898304.

The previous prime is 12001222221071. The next prime is 12001222221103. The reversal of 12001222221101 is 10112222210021.

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 4623338538025 + 7377883683076 = 2150195^2 + 2716226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001222221101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001222221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222221103) 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, 476642516 + ... + 476667693.

It is an arithmetic number, because the mean of its divisors is an integer number (3000543885975).

Almost surely, 2^{12001222221101} is an apocalyptic number.

It is an amenable number.

12001222221101 is a deficient number, since it is larger than the sum of its proper divisors (953322799).

12001222221101 is an equidigital number, since it uses as much as digits as its factorization.

12001222221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953322798.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12001222221101 its reverse (10112222210021), we get a palindrome (22113444431122).

The spelling of 12001222221101 in words is "twelve trillion, one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred one".