11203240421 has 2 divisors, whose sum is σ = 11203240422. Its totient is φ = 11203240420.

The previous prime is 11203240343. The next prime is 11203240459. The reversal of 11203240421 is 12404230211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6097423396 + 5105817025 = 78086^2 + 71455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11203240421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11203240393 and 11203240402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11203240481) 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 as a sum of consecutive naturals, namely, 5601620210 + 5601620211.

It is an arithmetic number, because the mean of its divisors is an integer number (5601620211).

Almost surely, 2^11203240421 is an apocalyptic number.

It is an amenable number.

11203240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11203240421 is an equidigital number, since it uses as much as digits as its factorization.

11203240421 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11203240421 its reverse (12404230211), we get a palindrome (23607470632).

The spelling of 11203240421 in words is "eleven billion, two hundred three million, two hundred forty thousand, four hundred twenty-one".