22001201121221 has 32 divisors (see below), whose sum is σ = 25592232960000. Its totient is φ = 18522724220352.

The previous prime is 22001201121203. The next prime is 22001201121223. The reversal of 22001201121221 is 12212110210022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22001201121221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22001201121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001201121223) 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 31 ways as a sum of consecutive naturals, for example, 3674825990 + ... + 3674831976.

It is an arithmetic number, because the mean of its divisors is an integer number (799757280000).

Almost surely, 2^{22001201121221} is an apocalyptic number.

It is an amenable number.

22001201121221 is a deficient number, since it is larger than the sum of its proper divisors (3591031838779).

22001201121221 is a wasteful number, since it uses less digits than its factorization.

22001201121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12161.

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

Adding to 22001201121221 its reverse (12212110210022), we get a palindrome (34213311331243).

The spelling of 22001201121221 in words is "twenty-two trillion, one billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty-one".