12021200011221 has 16 divisors (see below), whose sum is σ = 16069320712320. Its totient is φ = 7993610876160.

The previous prime is 12021200011211. The next prime is 12021200011229. The reversal of 12021200011221 is 12211000212021.

It is not a de Polignac number, because 12021200011221 - 2²⁹ = 12020663140309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021200011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021200011229) 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, 10087296 + ... + 11215878.

It is an arithmetic number, because the mean of its divisors is an integer number (1004332544520).

Almost surely, 2^{12021200011221} is an apocalyptic number.

It is an amenable number.

12021200011221 is a deficient number, since it is larger than the sum of its proper divisors (4048120701099).

12021200011221 is a wasteful number, since it uses less digits than its factorization.

12021200011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137676.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12021200011221 its reverse (12211000212021), we get a palindrome (24232200223242).

The spelling of 12021200011221 in words is "twelve trillion, twenty-one billion, two hundred million, eleven thousand, two hundred twenty-one".