12001001002221 has 16 divisors (see below), whose sum is σ = 19949715952128. Its totient is φ = 6234286234800.

The previous prime is 12001001002019. The next prime is 12001001002229. The reversal of 12001001002221 is 12220010010021.

It is not a de Polignac number, because 12001001002221 - 2¹¹ = 12001001000173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001001002197 and 12001001002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001001002229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25976192415 + ... + 25976192876.

It is an arithmetic number, because the mean of its divisors is an integer number (1246857247008).

Almost surely, 2^{12001001002221} is an apocalyptic number.

12001001002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001001002221 is a deficient number, since it is larger than the sum of its proper divisors (7948714949907).

12001001002221 is a wasteful number, since it uses less digits than its factorization.

12001001002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51952385312.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12001001002221 its reverse (12220010010021), we get a palindrome (24221011012242).

The spelling of 12001001002221 in words is "twelve trillion, one billion, one million, two thousand, two hundred twenty-one".