12111210002221 has 16 divisors (see below), whose sum is σ = 13336320064320. Its totient is φ = 10906825374720.

The previous prime is 12111210002207. The next prime is 12111210002291. The reversal of 12111210002221 is 12220001211121.

It is not a de Polignac number, because 12111210002221 - 2²³ = 12111201613613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111210002195 and 12111210002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111210002291) 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, 4479181 + ... + 6654733.

It is an arithmetic number, because the mean of its divisors is an integer number (833520004020).

Almost surely, 2^{12111210002221} is an apocalyptic number.

12111210002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111210002221 is a deficient number, since it is larger than the sum of its proper divisors (1225110062099).

12111210002221 is a wasteful number, since it uses less digits than its factorization.

12111210002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180316.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12111210002221 its reverse (12220001211121), we get a palindrome (24331211213342).

The spelling of 12111210002221 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, two thousand, two hundred twenty-one".