11203242221 has 2 divisors, whose sum is σ = 11203242222. Its totient is φ = 11203242220.

The previous prime is 11203242203. The next prime is 11203242227. The reversal of 11203242221 is 12224230211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6160680100 + 5042562121 = 78490^2 + 71011^2 .

It is a cyclic number.

It is not a de Polignac number, because 11203242221 - 2⁶ = 11203242157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11203242193 and 11203242202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11203242227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601621110 + 5601621111.

It is an arithmetic number, because the mean of its divisors is an integer number (5601621111).

Almost surely, 2^11203242221 is an apocalyptic number.

It is an amenable number.

11203242221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11203242221 is an equidigital number, since it uses as much as digits as its factorization.

11203242221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11203242221 its reverse (12224230211), we get a palindrome (23427472432).

The spelling of 11203242221 in words is "eleven billion, two hundred three million, two hundred forty-two thousand, two hundred twenty-one".