12221100211121 has 8 divisors (see below), whose sum is σ = 13133122616160. Its totient is φ = 11330537156928.

The previous prime is 12221100211081. The next prime is 12221100211123. The reversal of 12221100211121 is 12111200112221.

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 12221100211121 - 2¹⁰ = 12221100210097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 12221100211121.

It is not an unprimeable number, because it can be changed into a prime (12221100211123) 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, 5364836531 + ... + 5364838808.

It is an arithmetic number, because the mean of its divisors is an integer number (1641640327020).

Almost surely, 2^{12221100211121} is an apocalyptic number.

It is an amenable number.

12221100211121 is a deficient number, since it is larger than the sum of its proper divisors (912022405039).

12221100211121 is a wasteful number, since it uses less digits than its factorization.

12221100211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729675423.

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

Adding to 12221100211121 its reverse (12111200112221), we get a palindrome (24332300323342).

The spelling of 12221100211121 in words is "twelve trillion, two hundred twenty-one billion, one hundred million, two hundred eleven thousand, one hundred twenty-one".