12221112202121 has 8 divisors (see below), whose sum is σ = 12362318006280. Its totient is φ = 12080486299392.

The previous prime is 12221112202081. The next prime is 12221112202133. The reversal of 12221112202121 is 12120221112221.

12221112202121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 640288032400 + 11580824169721 = 800180^2 + 3403061^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12221112202121 - 2¹⁰ = 12221112201097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221112202093 and 12221112202102.

It is not an unprimeable number, because it can be changed into a prime (12221112202421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144932966 + ... + 145017263.

It is an arithmetic number, because the mean of its divisors is an integer number (1545289750785).

Almost surely, 2^{12221112202121} is an apocalyptic number.

It is an amenable number.

12221112202121 is a deficient number, since it is larger than the sum of its proper divisors (141205804159).

12221112202121 is a wasteful number, since it uses less digits than its factorization.

12221112202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289950715.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12221112202121 its reverse (12120221112221), we get a palindrome (24341333314342).

The spelling of 12221112202121 in words is "twelve trillion, two hundred twenty-one billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".