12221221001001 has 8 divisors (see below), whose sum is σ = 16339361775744. Its totient is φ = 8125280446800.

The previous prime is 12221221000987. The next prime is 12221221001009. The reversal of 12221221001001 is 10010012212221.

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

It is not a de Polignac number, because 12221221001001 - 2⁷ = 12221221000873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12221221001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5550053850 + ... + 5550056051.

It is an arithmetic number, because the mean of its divisors is an integer number (2042420221968).

Almost surely, 2^{12221221001001} is an apocalyptic number.

It is an amenable number.

12221221001001 is a deficient number, since it is larger than the sum of its proper divisors (4118140774743).

12221221001001 is a wasteful number, since it uses less digits than its factorization.

12221221001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100110271.

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

Adding to 12221221001001 its reverse (10010012212221), we get a palindrome (22231233213222).

The spelling of 12221221001001 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, one thousand, one".