22103501221 has 2 divisors, whose sum is σ = 22103501222. Its totient is φ = 22103501220.

The previous prime is 22103501191. The next prime is 22103501257. The reversal of 22103501221 is 12210530122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13715688996 + 8387812225 = 117114^2 + 91585^2 .

It is a cyclic number.

It is not a de Polignac number, because 22103501221 - 2⁷ = 22103501093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22703501221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11051750610 + 11051750611.

It is an arithmetic number, because the mean of its divisors is an integer number (11051750611).

Almost surely, 2^22103501221 is an apocalyptic number.

It is an amenable number.

22103501221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22103501221 is an equidigital number, since it uses as much as digits as its factorization.

22103501221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 22103501221 in words is "twenty-two billion, one hundred three million, five hundred one thousand, two hundred twenty-one".