19221103230221 has 4 divisors (see below), whose sum is σ = 19222617073212. Its totient is φ = 19219589387232.

The previous prime is 19221103230211. The next prime is 19221103230227. The reversal of 19221103230221 is 12203230112291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13675130040100 + 5545973190121 = 3697990^2 + 2354989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19221103230221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19221103230227) 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 3 ways as a sum of consecutive naturals, for example, 756902450 + ... + 756927843.

It is an arithmetic number, because the mean of its divisors is an integer number (4805654268303).

Almost surely, 2^{19221103230221} is an apocalyptic number.

It is an amenable number.

19221103230221 is a deficient number, since it is larger than the sum of its proper divisors (1513842991).

19221103230221 is a wasteful number, since it uses less digits than its factorization.

19221103230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513842990.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 19221103230221 in words is "nineteen trillion, two hundred twenty-one billion, one hundred three million, two hundred thirty thousand, two hundred twenty-one".