11305213421 has 2 divisors, whose sum is σ = 11305213422. Its totient is φ = 11305213420.

The previous prime is 11305213417. The next prime is 11305213457. The reversal of 11305213421 is 12431250311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6274857796 + 5030355625 = 79214^2 + 70925^2 .

It is a cyclic number.

It is not a de Polignac number, because 11305213421 - 2² = 11305213417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11305213411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5652606710 + 5652606711.

It is an arithmetic number, because the mean of its divisors is an integer number (5652606711).

Almost surely, 2^11305213421 is an apocalyptic number.

It is an amenable number.

11305213421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11305213421 is an equidigital number, since it uses as much as digits as its factorization.

11305213421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 11305213421 its reverse (12431250311), we get a palindrome (23736463732).

The spelling of 11305213421 in words is "eleven billion, three hundred five million, two hundred thirteen thousand, four hundred twenty-one".