12121221201 has 8 divisors (see below), whose sum is σ = 16598429184. Its totient is φ = 7862413680.

The previous prime is 12121221199. The next prime is 12121221227. The reversal of 12121221201 is 10212212121.

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

It is not a de Polignac number, because 12121221201 - 2¹ = 12121221199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121221701) 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, 54599985 + ... + 54600206.

It is an arithmetic number, because the mean of its divisors is an integer number (2074803648).

Almost surely, 2^12121221201 is an apocalyptic number.

It is an amenable number.

12121221201 is a deficient number, since it is larger than the sum of its proper divisors (4477207983).

12121221201 is a wasteful number, since it uses less digits than its factorization.

12121221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109200231.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12121221201 its reverse (10212212121), we get a palindrome (22333433322).

The spelling of 12121221201 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".