22101122001221 has 8 divisors (see below), whose sum is σ = 22212458400000. Its totient is φ = 21989788357680.

The previous prime is 22101122001191. The next prime is 22101122001247. The reversal of 22101122001221 is 12210022110122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22101122001221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22101122001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101122001251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16468091 + ... + 17759511.

It is an arithmetic number, because the mean of its divisors is an integer number (2776557300000).

Almost surely, 2^{22101122001221} is an apocalyptic number.

It is an amenable number.

22101122001221 is a deficient number, since it is larger than the sum of its proper divisors (111336398779).

22101122001221 is a wasteful number, since it uses less digits than its factorization.

22101122001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377619.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22101122001221 its reverse (12210022110122), we get a palindrome (34311144111343).

The spelling of 22101122001221 in words is "twenty-two trillion, one hundred one billion, one hundred twenty-two million, one thousand, two hundred twenty-one".