12221221102021 has 8 divisors (see below), whose sum is σ = 12275365846464. Its totient is φ = 12167079048960.

The previous prime is 12221221102003. The next prime is 12221221102039. The reversal of 12221221102021 is 12020112212221.

It is an interprime number because it is at equal distance from previous prime (12221221102003) and next prime (12221221102039).

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 12221221102021 - 2³⁷ = 12083782148549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221221102021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221221102081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8718696 + ... + 10022878.

It is an arithmetic number, because the mean of its divisors is an integer number (1534420730808).

Almost surely, 2^{12221221102021} is an apocalyptic number.

It is an amenable number.

12221221102021 is a deficient number, since it is larger than the sum of its proper divisors (54144744443).

12221221102021 is a wasteful number, since it uses less digits than its factorization.

12221221102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345691.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221221102021 its reverse (12020112212221), we get a palindrome (24241333314242).

The spelling of 12221221102021 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, twenty-one".