12001012222221 has 24 divisors (see below), whose sum is σ = 18929653670304. Its totient is φ = 7266045454560.

The previous prime is 12001012222201. The next prime is 12001012222279. The reversal of 12001012222221 is 12222221010021.

It is a happy number.

12001012222221 is a `hidden beast` number, since 1 + 200 + 10 + 12 + 222 + 221 = 666.

It is not a de Polignac number, because 12001012222221 - 2²⁵ = 12000978667789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001012222194 and 12001012222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001012222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60694851 + ... + 60892256.

It is an arithmetic number, because the mean of its divisors is an integer number (788735569596).

Almost surely, 2^{12001012222221} is an apocalyptic number.

12001012222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001012222221 is a deficient number, since it is larger than the sum of its proper divisors (6928641448083).

12001012222221 is a wasteful number, since it uses less digits than its factorization.

12001012222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121588121 (or 121588118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12001012222221 its reverse (12222221010021), we get a palindrome (24223233232242).

The spelling of 12001012222221 in words is "twelve trillion, one billion, twelve million, two hundred twenty-two thousand, two hundred twenty-one".