12221334615621 has 8 divisors (see below), whose sum is σ = 17253648869184. Its totient is φ = 7668288386240.

The previous prime is 12221334615583. The next prime is 12221334615653. The reversal of 12221334615621 is 12651643312221.

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 12221334615621 - 2¹¹ = 12221334613573 is a prime.

It is a super-2 number, since 2×12221334615621² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12221334615621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221334615691) 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, 119817005985 + ... + 119817006086.

It is an arithmetic number, because the mean of its divisors is an integer number (2156706108648).

Almost surely, 2^{12221334615621} is an apocalyptic number.

It is an amenable number.

12221334615621 is a deficient number, since it is larger than the sum of its proper divisors (5032314253563).

12221334615621 is a wasteful number, since it uses less digits than its factorization.

12221334615621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239634012091.

The product of its digits is 103680, while the sum is 39.

Adding to 12221334615621 its reverse (12651643312221), we get a palindrome (24872977927842).

The spelling of 12221334615621 in words is "twelve trillion, two hundred twenty-one billion, three hundred thirty-four million, six hundred fifteen thousand, six hundred twenty-one".