22120000221221 has 32 divisors (see below), whose sum is σ = 26829707520000. Its totient is φ = 17814425815872.

The previous prime is 22120000221169. The next prime is 22120000221227. The reversal of 22120000221221 is 12212200002122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-22120000221221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22120000221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120000221227) 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, 17258255 + ... + 18495603.

It is an arithmetic number, because the mean of its divisors is an integer number (838428360000).

Almost surely, 2^{22120000221221} is an apocalyptic number.

It is an amenable number.

22120000221221 is a deficient number, since it is larger than the sum of its proper divisors (4709707298779).

22120000221221 is a wasteful number, since it uses less digits than its factorization.

22120000221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238481.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22120000221221 its reverse (12212200002122), we get a palindrome (34332200223343).

The spelling of 22120000221221 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-one thousand, two hundred twenty-one".