12221101012121 has 4 divisors (see below), whose sum is σ = 12253865358372. Its totient is φ = 12188336665872.

The previous prime is 12221101012031. The next prime is 12221101012147. The reversal of 12221101012121 is 12121010112221.

12221101012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9687257854096 + 2533843158025 = 3112436^2 + 1591805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221101012121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221101012121.

It is not an unprimeable number, because it can be changed into a prime (12221101012171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16382172566 + ... + 16382173311.

It is an arithmetic number, because the mean of its divisors is an integer number (3063466339593).

Almost surely, 2^{12221101012121} is an apocalyptic number.

It is an amenable number.

12221101012121 is a deficient number, since it is larger than the sum of its proper divisors (32764346251).

12221101012121 is an equidigital number, since it uses as much as digits as its factorization.

12221101012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32764346250.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12221101012121 its reverse (12121010112221), we get a palindrome (24342111124342).

The spelling of 12221101012121 in words is "twelve trillion, two hundred twenty-one billion, one hundred one million, twelve thousand, one hundred twenty-one".