12221204040221 has 16 divisors (see below), whose sum is σ = 13646821771968. Its totient is φ = 10848191760000.

The previous prime is 12221204040191. The next prime is 12221204040239. The reversal of 12221204040221 is 12204040212221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221204040221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221204040251) 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, 2885366 + ... + 5724311.

It is an arithmetic number, because the mean of its divisors is an integer number (852926360748).

Almost surely, 2^{12221204040221} is an apocalyptic number.

12221204040221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221204040221 is a deficient number, since it is larger than the sum of its proper divisors (1425617731747).

12221204040221 is a wasteful number, since it uses less digits than its factorization.

12221204040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8612732.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 12221204040221 its reverse (12204040212221), we get a palindrome (24425244252442).

The spelling of 12221204040221 in words is "twelve trillion, two hundred twenty-one billion, two hundred four million, forty thousand, two hundred twenty-one".